631528 has 8 divisors (see below), whose sum is σ = 1184130. Its totient is φ = 315760.

The previous prime is 631513. The next prime is 631529. The reversal of 631528 is 825136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 605284 + 26244 = 778^2 + 162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×631528² = 797655229568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39463 + ... + 39478.

2⁶³¹⁵²⁸ is an apocalyptic number.

It is an amenable number.

631528 is a deficient number, since it is larger than the sum of its proper divisors (552602).

631528 is a wasteful number, since it uses less digits than its factorization.

631528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78947 (or 78943 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 631528 is about 794.6873599095. The cubic root of 631528 is about 85.7954395419.

The spelling of 631528 in words is "six hundred thirty-one thousand, five hundred twenty-eight".