74431865 has 16 divisors (see below), whose sum is σ = 94847760. Its totient is φ = 55879680.

The previous prime is 74431853. The next prime is 74431871. The reversal of 74431865 is 56813447.

It can be written as a sum of positive squares in 8 ways, for example, as 24078649 + 50353216 = 4907^2 + 7096^2 .

It is not a de Polignac number, because 74431865 - 2¹⁸ = 74169721 is a prime.

It is a Curzon number.

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, 33695 + ... + 35835.

It is an arithmetic number, because the mean of its divisors is an integer number (5927985).

Almost surely, 2^74431865 is an apocalyptic number.

It is an amenable number.

74431865 is a deficient number, since it is larger than the sum of its proper divisors (20415895).

74431865 is a wasteful number, since it uses less digits than its factorization.

74431865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 80640, while the sum is 38.

The square root of 74431865 is about 8627.3903933924. The cubic root of 74431865 is about 420.6487799951.

The spelling of 74431865 in words is "seventy-four million, four hundred thirty-one thousand, eight hundred sixty-five".