74785478 has 16 divisors (see below), whose sum is σ = 113340816. Its totient is φ = 37007520.

The previous prime is 74785457. The next prime is 74785481. The reversal of 74785478 is 87458747.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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, 114200 + ... + 114852.

It is an arithmetic number, because the mean of its divisors is an integer number (7083801).

Almost surely, 2^74785478 is an apocalyptic number.

74785478 is a deficient number, since it is larger than the sum of its proper divisors (38555338).

74785478 is a wasteful number, since it uses less digits than its factorization.

74785478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its digits is 1756160, while the sum is 50.

The square root of 74785478 is about 8647.8597352177. The cubic root of 74785478 is about 421.3138712158.

The spelling of 74785478 in words is "seventy-four million, seven hundred eighty-five thousand, four hundred seventy-eight".