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9990000 = 24335437
BaseRepresentation
bin100110000110…
…111101110000
3200210112201000
4212012331300
510024140000
6554042000
7150625236
oct46067560
920715630
109990000
1157036a9
123419300
1320ba157
141480956
15d25000
hex986f70

9990000 has 200 divisors, whose sum is σ = 36800720. Its totient is φ = 2592000.

The previous prime is 9989957. The next prime is 9990017. The reversal of 9990000 is 999.

9990000 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 269982 + ... + 270018.

Almost surely, 29990000 is an apocalyptic number.

9990000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18400360).

9990000 is an abundant number, since it is smaller than the sum of its proper divisors (26810720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9990000 is a wasteful number, since it uses less digits than its factorization.

9990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 9990000 is about 3160.6961258558. The cubic root of 9990000 is about 215.3716305620.

Adding to 9990000 its reverse (999), we get a palindrome (9990999).

Multiplying 9990000 by its reverse (999), we get a square (9980010000 = 999002).

9990000 divided by its reverse (999) gives a 4-th power (10000 = 104).

The spelling of 9990000 in words is "nine million, nine hundred ninety thousand".