31423874 has 8 divisors (see below), whose sum is σ = 47380620. Its totient is φ = 15630336.

The previous prime is 31423823. The next prime is 31423877. The reversal of 31423874 is 47832413.

It can be written as a sum of positive squares in 2 ways, for example, as 30085225 + 1338649 = 5485^2 + 1157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31423874.

It is not an unprimeable number, because it can be changed into a prime (31423877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40319 + ... + 41090.

Almost surely, 2^31423874 is an apocalyptic number.

31423874 is a deficient number, since it is larger than the sum of its proper divisors (15956746).

31423874 is a wasteful number, since it uses less digits than its factorization.

31423874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81604.

The product of its digits is 16128, while the sum is 32.

The square root of 31423874 is about 5605.7001346843. The cubic root of 31423874 is about 315.5633623911.

The spelling of 31423874 in words is "thirty-one million, four hundred twenty-three thousand, eight hundred seventy-four".