631828 has 12 divisors (see below), whose sum is σ = 1112832. Its totient is φ = 313880.

The previous prime is 631819. The next prime is 631843. The reversal of 631828 is 828136.

It is a junction number, because it is equal to n+sod(n) for n = 631796 and 631805.

It is a congruent number.

It is an unprimeable number.

631828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (92736).

2⁶³¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

631828 is a deficient number, since it is larger than the sum of its proper divisors (481004).

631828 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 14 representation: 631828 = (126388)₁₄.

631828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 631828 is about 794.8760909727. The cubic root of 631828 is about 85.8090227650.

It can be divided in two parts, 63182 and 8, that added together give a triangular number (63190 = T₃₅₅).

The spelling of 631828 in words is "six hundred thirty-one thousand, eight hundred twenty-eight".