78157000 has 32 divisors (see below), whose sum is σ = 182889720. Its totient is φ = 31262400.

The previous prime is 78156997. The next prime is 78157031. The reversal of 78157000 is 75187.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3818116 + 74338884 = 1954^2 + 8622^2 .

It is a super-2 number, since 2×78157000² = 12217033298000000, 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 78157000.

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, 38079 + ... + 40078.

Almost surely, 2^78157000 is an apocalyptic number.

It is an amenable number.

78157000 is an abundant number, since it is smaller than the sum of its proper divisors (104732720).

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

78157000 is a wasteful number, since it uses less digits than its factorization.

78157000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78178 (or 78164 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 78157000 is about 8840.6447728658. The cubic root of 78157000 is about 427.5523458809.

The spelling of 78157000 in words is "seventy-eight million, one hundred fifty-seven thousand".