31613828 has 12 divisors (see below), whose sum is σ = 57232140. Its totient is φ = 15261792.

The previous prime is 31613819. The next prime is 31613833. The reversal of 31613828 is 82831613.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26956864 + 4656964 = 5192^2 + 2158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31613794 and 31613803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136151 + ... + 136382.

It is an arithmetic number, because the mean of its divisors is an integer number (4769345).

Almost surely, 2^31613828 is an apocalyptic number.

It is an amenable number.

31613828 is a deficient number, since it is larger than the sum of its proper divisors (25618312).

31613828 is a wasteful number, since it uses less digits than its factorization.

31613828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272566 (or 272564 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 31613828 is about 5622.6175399008. The cubic root of 31613828 is about 316.1979345305.

It can be divided in two parts, 3 and 1613828, that multiplied together give a palindrome (4841484).

The spelling of 31613828 in words is "thirty-one million, six hundred thirteen thousand, eight hundred twenty-eight".