97880440 has 48 divisors (see below), whose sum is σ = 256192200. Its totient is φ = 33558336.

The previous prime is 97880437. The next prime is 97880467. The reversal of 97880440 is 4408879.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 97880393 and 97880402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23010 + ... + 26929.

Almost surely, 2^97880440 is an apocalyptic number.

It is an amenable number.

97880440 is an abundant number, since it is smaller than the sum of its proper divisors (158311760).

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

97880440 is a wasteful number, since it uses less digits than its factorization.

97880440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49964 (or 49953 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 97880440 is about 9893.4544017749. The cubic root of 97880440 is about 460.8560618319.

It can be divided in two parts, 978 and 80440, that added together give a palindrome (81418).

The spelling of 97880440 in words is "ninety-seven million, eight hundred eighty thousand, four hundred forty".