78762978 has 24 divisors (see below), whose sum is σ = 195032448. Its totient is φ = 22503672.

The previous prime is 78762949. The next prime is 78762979. The reversal of 78762978 is 87926787.

78762978 is a `hidden beast` number, since 7 + 8 + 7 + 629 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (78762979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312426 + ... + 312677.

It is an arithmetic number, because the mean of its divisors is an integer number (8126352).

Almost surely, 2^78762978 is an apocalyptic number.

78762978 is an abundant number, since it is smaller than the sum of its proper divisors (116269470).

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

78762978 is a wasteful number, since it uses less digits than its factorization.

78762978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625118 (or 625115 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 78762978 is about 8874.8508719865. The cubic root of 78762978 is about 428.6544889489.

The spelling of 78762978 in words is "seventy-eight million, seven hundred sixty-two thousand, nine hundred seventy-eight".