74731985 has 16 divisors (see below), whose sum is σ = 93612240. Its totient is φ = 57200640.

The previous prime is 74731933. The next prime is 74732003. The reversal of 74731985 is 58913747.

74731985 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 8 ways, for example, as 15272464 + 59459521 = 3908^2 + 7711^2 .

It is not a de Polignac number, because 74731985 - 2⁸ = 74731729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14105 + ... + 18665.

It is an arithmetic number, because the mean of its divisors is an integer number (5850765).

Almost surely, 2^74731985 is an apocalyptic number.

It is an amenable number.

74731985 is a deficient number, since it is larger than the sum of its proper divisors (18880255).

74731985 is a wasteful number, since it uses less digits than its factorization.

74731985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708.

The product of its digits is 211680, while the sum is 44.

The square root of 74731985 is about 8644.7663357664. The cubic root of 74731985 is about 421.2133939609.

The spelling of 74731985 in words is "seventy-four million, seven hundred thirty-one thousand, nine hundred eighty-five".