78538892 has 12 divisors (see below), whose sum is σ = 138432840. Its totient is φ = 38986656.

The previous prime is 78538891. The next prime is 78538919. The reversal of 78538892 is 29883587.

It is a self number, because there is not a number n which added to its sum of digits gives 78538892.

It is not an unprimeable number, because it can be changed into a prime (78538891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70073 + ... + 71184.

It is an arithmetic number, because the mean of its divisors is an integer number (11536070).

Almost surely, 2^78538892 is an apocalyptic number.

It is an amenable number.

78538892 is a deficient number, since it is larger than the sum of its proper divisors (59893948).

78538892 is a wasteful number, since it uses less digits than its factorization.

78538892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141400 (or 141398 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 78538892 is about 8862.2171040886. The cubic root of 78538892 is about 428.2475858104.

The spelling of 78538892 in words is "seventy-eight million, five hundred thirty-eight thousand, eight hundred ninety-two".