31082028 has 12 divisors (see below), whose sum is σ = 72524760. Its totient is φ = 10360672.

The previous prime is 31082027. The next prime is 31082033. The reversal of 31082028 is 82028013.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31081989 and 31082007.

It is not an unprimeable number, because it can be changed into a prime (31082021) 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, 1295073 + ... + 1295096.

It is an arithmetic number, because the mean of its divisors is an integer number (6043730).

Almost surely, 2^31082028 is an apocalyptic number.

It is an amenable number.

31082028 is an abundant number, since it is smaller than the sum of its proper divisors (41442732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31082028 is a wasteful number, since it uses less digits than its factorization.

31082028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590176 (or 2590174 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 31082028 is about 5575.1258281764. The cubic root of 31082028 is about 314.4148977395.

The spelling of 31082028 in words is "thirty-one million, eighty-two thousand, twenty-eight".