31028 has 6 divisors (see below), whose sum is σ = 54306. Its totient is φ = 15512.

The previous prime is 31019. The next prime is 31033. The reversal of 31028 is 82013.

It can be written as a sum of positive squares in only one way, i.e., 29584 + 1444 = 172^2 + 38^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31028.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875 + ... + 3882.

It is an arithmetic number, because the mean of its divisors is an integer number (9051).

2³¹⁰²⁸ is an apocalyptic number.

It is an amenable number.

31028 is a deficient number, since it is larger than the sum of its proper divisors (23278).

31028 is a wasteful number, since it uses less digits than its factorization.

31028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761 (or 7759 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31028 is about 176.1476653266. The cubic root of 31028 is about 31.4232615980.

The spelling of 31028 in words is "thirty-one thousand, twenty-eight".