31345028 has 24 divisors (see below), whose sum is σ = 64444800. Its totient is φ = 13151520.

The previous prime is 31345019. The next prime is 31345049. The reversal of 31345028 is 82054313.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 31344988 and 31345006.

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, 26828 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (2685200).

Almost surely, 2^31345028 is an apocalyptic number.

It is an amenable number.

31345028 is an abundant number, since it is smaller than the sum of its proper divisors (33099772).

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

31345028 is a wasteful number, since it uses less digits than its factorization.

31345028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54827 (or 54825 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 31345028 is about 5598.6630546944. The cubic root of 31345028 is about 315.2992134663.

The spelling of 31345028 in words is "thirty-one million, three hundred forty-five thousand, twenty-eight".