31364428 has 24 divisors (see below), whose sum is σ = 57254400. Its totient is φ = 15015168.

The previous prime is 31364407. The next prime is 31364447. The reversal of 31364428 is 82446313.

It is a self number, because there is not a number n which added to its sum of digits gives 31364428.

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, 13668 + ... + 15796.

It is an arithmetic number, because the mean of its divisors is an integer number (2385600).

Almost surely, 2^31364428 is an apocalyptic number.

It is an amenable number.

31364428 is a deficient number, since it is larger than the sum of its proper divisors (25889972).

31364428 is a wasteful number, since it uses less digits than its factorization.

31364428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 2287 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 31364428 is about 5600.3953431878. The cubic root of 31364428 is about 315.3642481638.

The spelling of 31364428 in words is "thirty-one million, three hundred sixty-four thousand, four hundred twenty-eight".