77398974 has 24 divisors (see below), whose sum is σ = 170863992. Its totient is φ = 25312560.

The previous prime is 77398969. The next prime is 77398991. The reversal of 77398974 is 47989377.

It is a self number, because there is not a number n which added to its sum of digits gives 77398974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39612 + ... + 41519.

It is an arithmetic number, because the mean of its divisors is an integer number (7119333).

Almost surely, 2^77398974 is an apocalyptic number.

77398974 is an abundant number, since it is smaller than the sum of its proper divisors (93465018).

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

77398974 is a wasteful number, since it uses less digits than its factorization.

77398974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81192 (or 81189 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 77398974 is about 8797.6686684598. The cubic root of 77398974 is about 426.1656104095.

The spelling of 77398974 in words is "seventy-seven million, three hundred ninety-eight thousand, nine hundred seventy-four".