97902640 has 40 divisors (see below), whose sum is σ = 248318928. Its totient is φ = 35600640.

The previous prime is 97902631. The next prime is 97902641. The reversal of 97902640 is 4620979.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 97902640.

It is not an unprimeable number, because it can be changed into a prime (97902641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54747 + ... + 56506.

Almost surely, 2^97902640 is an apocalyptic number.

It is an amenable number.

97902640 is an abundant number, since it is smaller than the sum of its proper divisors (150416288).

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

97902640 is a wasteful number, since it uses less digits than its factorization.

97902640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111277 (or 111271 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 97902640 is about 9894.5762920905. The cubic root of 97902640 is about 460.8909010404.

The spelling of 97902640 in words is "ninety-seven million, nine hundred two thousand, six hundred forty".