97578240 has 72 divisors (see below), whose sum is σ = 311652768. Its totient is φ = 26019840.

The previous prime is 97578209. The next prime is 97578253. The reversal of 97578240 is 4287579.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 97578192 and 97578201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8866 + ... + 16545.

Almost surely, 2^97578240 is an apocalyptic number.

It is an amenable number.

97578240 is an abundant number, since it is smaller than the sum of its proper divisors (214074528).

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

97578240 is a wasteful number, since it uses less digits than its factorization.

97578240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25435 (or 25421 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 97578240 is about 9878.1698709832. The cubic root of 97578240 is about 460.3812843781.

The spelling of 97578240 in words is "ninety-seven million, five hundred seventy-eight thousand, two hundred forty".