97115840 has 56 divisors (see below), whose sum is σ = 243443760. Its totient is φ = 36799488.

The previous prime is 97115819. The next prime is 97115857. The reversal of 97115840 is 4851179.

It is a self number, because there is not a number n which added to its sum of digits gives 97115840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907 + ... + 14066.

It is an arithmetic number, because the mean of its divisors is an integer number (4347210).

Almost surely, 2^97115840 is an apocalyptic number.

It is an amenable number.

97115840 is an abundant number, since it is smaller than the sum of its proper divisors (146327920).

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

97115840 is a wasteful number, since it uses less digits than its factorization.

97115840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16009 (or 15999 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 97115840 is about 9854.7369320546. The cubic root of 97115840 is about 459.6529202915.

It can be divided in two parts, 9711 and 5840, that added together give a palindrome (15551).

The spelling of 97115840 in words is "ninety-seven million, one hundred fifteen thousand, eight hundred forty".