1312388 has 24 divisors (see below), whose sum is σ = 2864064. Its totient is φ = 511200.

The previous prime is 1312379. The next prime is 1312391. The reversal of 1312388 is 8832131.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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, 1823 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (119336).

2^1312388 is an apocalyptic number.

It is an amenable number.

1312388 is an abundant number, since it is smaller than the sum of its proper divisors (1551676).

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

1312388 is a wasteful number, since it uses less digits than its factorization.

1312388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283 (or 4281 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1312388 is about 1145.5950418887. The cubic root of 1312388 is about 109.4848640839.

The spelling of 1312388 in words is "one million, three hundred twelve thousand, three hundred eighty-eight".