531628 has 12 divisors (see below), whose sum is σ = 962640. Its totient is φ = 256592.

The previous prime is 531623. The next prime is 531631. The reversal of 531628 is 826135.

It is a happy number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (531623) 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, 2176 + ... + 2407.

It is an arithmetic number, because the mean of its divisors is an integer number (80220).

2⁵³¹⁶²⁸ is an apocalyptic number.

531628 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

531628 is a deficient number, since it is larger than the sum of its proper divisors (431012).

531628 is a wasteful number, since it uses less digits than its factorization.

531628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 4614 counting only the distinct ones).

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

The square root of 531628 is about 729.1282466069. The cubic root of 531628 is about 81.0094994701.

It can be divided in two parts, 53 and 1628, that added together give a square (1681 = 41²).

The spelling of 531628 in words is "five hundred thirty-one thousand, six hundred twenty-eight".