1231568428 has 12 divisors (see below), whose sum is σ = 2155507200. Its totient is φ = 615709232.

The previous prime is 1231568413. The next prime is 1231568453. The reversal of 1231568428 is 8248651321.

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, 35925 + ... + 61267.

It is an arithmetic number, because the mean of its divisors is an integer number (179625600).

Almost surely, 2^1231568428 is an apocalyptic number.

It is an amenable number.

1231568428 is a deficient number, since it is larger than the sum of its proper divisors (923938772).

1231568428 is a wasteful number, since it uses less digits than its factorization.

1231568428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37496 (or 37494 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 1231568428 is about 35093.7092368419. The cubic root of 1231568428 is about 1071.8964904791.

The spelling of 1231568428 in words is "one billion, two hundred thirty-one million, five hundred sixty-eight thousand, four hundred twenty-eight".