78567938 has 4 divisors (see below), whose sum is σ = 117851910. Its totient is φ = 39283968.

The previous prime is 78567917. The next prime is 78567941. The reversal of 78567938 is 83976587.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67190809 + 11377129 = 8197^2 + 3373^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78567938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19641983 + ... + 19641986.

Almost surely, 2^78567938 is an apocalyptic number.

78567938 is a deficient number, since it is larger than the sum of its proper divisors (39283972).

78567938 is a wasteful number, since it uses less digits than its factorization.

78567938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39283971.

The product of its digits is 2540160, while the sum is 53.

The square root of 78567938 is about 8863.8557073093. The cubic root of 78567938 is about 428.3003721686.

The spelling of 78567938 in words is "seventy-eight million, five hundred sixty-seven thousand, nine hundred thirty-eight".