231242628 has 24 divisors (see below), whose sum is σ = 544519360. Its totient is φ = 76373280.

The previous prime is 231242593. The next prime is 231242651. The reversal of 231242628 is 826242132.

231242628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231242595 and 231242604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87088 + ... + 89703.

Almost surely, 2^231242628 is an apocalyptic number.

It is an amenable number.

231242628 is an abundant number, since it is smaller than the sum of its proper divisors (313276732).

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

231242628 is a wasteful number, since it uses less digits than its factorization.

231242628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176907 (or 176905 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 231242628 is about 15206.6639339469. The cubic root of 231242628 is about 613.7939905945.

It can be divided in two parts, 23124 and 2628, that added together give a palindrome (25752).

The spelling of 231242628 in words is "two hundred thirty-one million, two hundred forty-two thousand, six hundred twenty-eight".