97578992 has 60 divisors (see below), whose sum is σ = 223150896. Its totient is φ = 41207040.

The previous prime is 97578991. The next prime is 97579021. The reversal of 97578992 is 29987579.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97578991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54788 + ... + 56540.

Almost surely, 2^97578992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97578992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111575448).

97578992 is an abundant number, since it is smaller than the sum of its proper divisors (125571904).

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

97578992 is a wasteful number, since it uses less digits than its factorization.

97578992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1833 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 56.

The square root of 97578992 is about 9878.2079346408. The cubic root of 97578992 is about 460.3824670388.

The spelling of 97578992 in words is "ninety-seven million, five hundred seventy-eight thousand, nine hundred ninety-two".