231628 has 12 divisors (see below), whose sum is σ = 411040. Its totient is φ = 114192.

The previous prime is 231613. The next prime is 231631. The reversal of 231628 is 826132.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 231599 and 231608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51 + ... + 682.

2²³¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

231628 is a deficient number, since it is larger than the sum of its proper divisors (179412).

231628 is a wasteful number, since it uses less digits than its factorization.

231628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 231628 is about 481.2774667487. The cubic root of 231628 is about 61.4134769371.

The spelling of 231628 in words is "two hundred thirty-one thousand, six hundred twenty-eight".