1397685020 has 12 divisors (see below), whose sum is σ = 2935138584. Its totient is φ = 559074000.

The previous prime is 1397685001. The next prime is 1397685041. The reversal of 1397685020 is 205867931.

It is a congruent number.

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, 34942106 + ... + 34942145.

It is an arithmetic number, because the mean of its divisors is an integer number (244594882).

Almost surely, 2^1397685020 is an apocalyptic number.

1397685020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397685020 is an abundant number, since it is smaller than the sum of its proper divisors (1537453564).

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

1397685020 is a wasteful number, since it uses less digits than its factorization.

1397685020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69884260 (or 69884258 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1397685020 is about 37385.6258473762. The cubic root of 1397685020 is about 1118.0719965412.

The spelling of 1397685020 in words is "one billion, three hundred ninety-seven million, six hundred eighty-five thousand, twenty".