31828028 has 12 divisors (see below), whose sum is σ = 56273952. Its totient is φ = 15749760.

The previous prime is 31828019. The next prime is 31828061. The reversal of 31828028 is 82082813.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31827985 and 31828003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40628 + ... + 41403.

It is an arithmetic number, because the mean of its divisors is an integer number (4689496).

Almost surely, 2^31828028 is an apocalyptic number.

It is an amenable number.

31828028 is a deficient number, since it is larger than the sum of its proper divisors (24445924).

31828028 is a wasteful number, since it uses less digits than its factorization.

31828028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82132 (or 82130 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 31828028 is about 5641.6334514039. The cubic root of 31828028 is about 316.9104624273.

The spelling of 31828028 in words is "thirty-one million, eight hundred twenty-eight thousand, twenty-eight".