231530628 has 48 divisors (see below), whose sum is σ = 620031104. Its totient is φ = 65871360.

The previous prime is 231530617. The next prime is 231530657. The reversal of 231530628 is 826035132.

It is a junction number, because it is equal to n+sod(n) for n = 231530595 and 231530604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14526 + ... + 25962.

Almost surely, 2^231530628 is an apocalyptic number.

231530628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231530628 is an abundant number, since it is smaller than the sum of its proper divisors (388500476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231530628 is a wasteful number, since it uses less digits than its factorization.

231530628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11692 (or 11690 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 231530628 is about 15216.1305199449. The cubic root of 231530628 is about 614.0487004558.

The spelling of 231530628 in words is "two hundred thirty-one million, five hundred thirty thousand, six hundred twenty-eight".