1397309532 has 24 divisors (see below), whose sum is σ = 3272793216. Its totient is φ = 463997808.

The previous prime is 1397309519. The next prime is 1397309569. The reversal of 1397309532 is 2359037931.

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, 218218 + ... + 224529.

It is an arithmetic number, because the mean of its divisors is an integer number (136366384).

Almost surely, 2^1397309532 is an apocalyptic number.

1397309532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1397309532 is an abundant number, since it is smaller than the sum of its proper divisors (1875483684).

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

1397309532 is a wasteful number, since it uses less digits than its factorization.

1397309532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443017 (or 443015 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 42.

The square root of 1397309532 is about 37380.6036869390. The cubic root of 1397309532 is about 1117.9718642480.

The spelling of 1397309532 in words is "one billion, three hundred ninety-seven million, three hundred nine thousand, five hundred thirty-two".