9957297990 has 16 divisors (see below), whose sum is σ = 23897515248. Its totient is φ = 2655279456.

The previous prime is 9957297971. The next prime is 9957298003. The reversal of 9957297990 is 997927599.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165954937 + ... + 165954996.

It is an arithmetic number, because the mean of its divisors is an integer number (1493594703).

Almost surely, 2^9957297990 is an apocalyptic number.

9957297990 is an abundant number, since it is smaller than the sum of its proper divisors (13940217258).

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

9957297990 is a wasteful number, since it uses less digits than its factorization.

9957297990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331909943.

The product of its (nonzero) digits is 28934010, while the sum is 66.

The square root of 9957297990 is about 99786.2615293308. The cubic root of 9957297990 is about 2151.3636915588.

The spelling of 9957297990 in words is "nine billion, nine hundred fifty-seven million, two hundred ninety-seven thousand, nine hundred ninety".