78568840 has 32 divisors (see below), whose sum is σ = 202034880. Its totient is φ = 26937792.

The previous prime is 78568837. The next prime is 78568877. The reversal of 78568840 is 4886587.

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, 140022 + ... + 140581.

It is an arithmetic number, because the mean of its divisors is an integer number (6313590).

Almost surely, 2^78568840 is an apocalyptic number.

78568840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78568840 is an abundant number, since it is smaller than the sum of its proper divisors (123466040).

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

78568840 is a wasteful number, since it uses less digits than its factorization.

78568840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280621 (or 280617 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 78568840 is about 8863.9065879554. The cubic root of 78568840 is about 428.3020111979.

The spelling of 78568840 in words is "seventy-eight million, five hundred sixty-eight thousand, eight hundred forty".