9972090 has 48 divisors (see below), whose sum is σ = 26114400. Its totient is φ = 2640096.

The previous prime is 9972059. The next prime is 9972101. The reversal of 9972090 is 902799.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15801 + ... + 16419.

It is an arithmetic number, because the mean of its divisors is an integer number (544050).

Almost surely, 2^9972090 is an apocalyptic number.

9972090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9972090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13057200).

9972090 is an abundant number, since it is smaller than the sum of its proper divisors (16142310).

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

9972090 is a wasteful number, since it uses less digits than its factorization.

9972090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 9972090 is about 3157.8616182474. The cubic root of 9972090 is about 215.2428480022.

The spelling of 9972090 in words is "nine million, nine hundred seventy-two thousand, ninety".