74978156 has 24 divisors (see below), whose sum is σ = 143366160. Its totient is φ = 34027200.

The previous prime is 74978149. The next prime is 74978171. The reversal of 74978156 is 65187947.

It is a self number, because there is not a number n which added to its sum of digits gives 74978156.

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, 44090 + ... + 45758.

It is an arithmetic number, because the mean of its divisors is an integer number (5973590).

Almost surely, 2^74978156 is an apocalyptic number.

It is an amenable number.

74978156 is a deficient number, since it is larger than the sum of its proper divisors (68388004).

74978156 is a wasteful number, since it uses less digits than its factorization.

74978156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2703 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 74978156 is about 8658.9927820734. The cubic root of 74978156 is about 421.6753865795.

The spelling of 74978156 in words is "seventy-four million, nine hundred seventy-eight thousand, one hundred fifty-six".