78205872 has 40 divisors (see below), whose sum is σ = 203933376. Its totient is φ = 25823296.

The previous prime is 78205823. The next prime is 78205889. The reversal of 78205872 is 27850287.

It is a super-2 number, since 2×78205872² = 12232316830560768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78205872.

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, 2478 + ... + 12749.

Almost surely, 2^78205872 is an apocalyptic number.

It is an amenable number.

78205872 is an abundant number, since it is smaller than the sum of its proper divisors (125727504).

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

78205872 is a wasteful number, since it uses less digits than its factorization.

78205872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345 (or 15339 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 78205872 is about 8843.4083926957. The cubic root of 78205872 is about 427.6414442531.

The spelling of 78205872 in words is "seventy-eight million, two hundred five thousand, eight hundred seventy-two".