1397135572 has 24 divisors (see below), whose sum is σ = 2795869440. Its totient is φ = 598429920.

The previous prime is 1397135549. The next prime is 1397135587. The reversal of 1397135572 is 2755317931.

It is a congruent number.

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, 39054 + ... + 65722.

It is an arithmetic number, because the mean of its divisors is an integer number (116494560).

Almost surely, 2^1397135572 is an apocalyptic number.

It is an amenable number.

1397135572 is an abundant number, since it is smaller than the sum of its proper divisors (1398733868).

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

1397135572 is a wasteful number, since it uses less digits than its factorization.

1397135572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28551 (or 28549 counting only the distinct ones).

The product of its digits is 198450, while the sum is 43.

The square root of 1397135572 is about 37378.2767393041. The cubic root of 1397135572 is about 1117.9254678335.

The spelling of 1397135572 in words is "one billion, three hundred ninety-seven million, one hundred thirty-five thousand, five hundred seventy-two".