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990522 = 233131783
BaseRepresentation
bin11110001110100111010
31212022202000
43301310322
5223144042
633121430
711263551
oct3616472
91768660
10990522
11617215
123b9276
13288b10
1514874c
hexf1d3a

990522 has 64 divisors (see below), whose sum is σ = 2540160. Its totient is φ = 283392.

The previous prime is 990511. The next prime is 990523. The reversal of 990522 is 225099.

It is a super-2 number, since 2×9905222 = 1962267664968, which contains 22 as substring.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990522.

It is not an unprimeable number, because it can be changed into a prime (990523) by changing a digit.

990522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11893 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2990522 is an apocalyptic number.

990522 is the 498-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270080).

990522 is an abundant number, since it is smaller than the sum of its proper divisors (1549638).

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

990522 is a wasteful number, since it uses less digits than its factorization.

990522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 990522 is about 995.2497174076. The cubic root of 990522 is about 99.6830632388.

The spelling of 990522 in words is "nine hundred ninety thousand, five hundred twenty-two".