1312985268 has 96 divisors (see below), whose sum is σ = 4059525120. Its totient is φ = 358823520.

The previous prime is 1312985257. The next prime is 1312985273. The reversal of 1312985268 is 8625892131.

1312985268 is a `hidden beast` number, since 1 + 31 + 2 + 98 + 526 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20368 + ... + 55143.

It is an arithmetic number, because the mean of its divisors is an integer number (42286720).

Almost surely, 2^1312985268 is an apocalyptic number.

1312985268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1312985268 is an abundant number, since it is smaller than the sum of its proper divisors (2746539852).

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

1312985268 is a wasteful number, since it uses less digits than its factorization.

1312985268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75554 (or 75546 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1312985268 is about 36235.1385812170. The cubic root of 1312985268 is about 1095.0147042499.

The spelling of 1312985268 in words is "one billion, three hundred twelve million, nine hundred eighty-five thousand, two hundred sixty-eight".