97398640 has 20 divisors (see below), whose sum is σ = 226452024. Its totient is φ = 38959424.

The previous prime is 97398619. The next prime is 97398641. The reversal of 97398640 is 4689379.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97398641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608662 + ... + 608821.

Almost surely, 2^97398640 is an apocalyptic number.

It is an amenable number.

97398640 is an abundant number, since it is smaller than the sum of its proper divisors (129053384).

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

97398640 is a wasteful number, since it uses less digits than its factorization.

97398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217496 (or 1217490 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 97398640 is about 9869.0749313196. The cubic root of 97398640 is about 460.0986555885.

The spelling of 97398640 in words is "ninety-seven million, three hundred ninety-eight thousand, six hundred forty".