1397715128 has 16 divisors (see below), whose sum is σ = 2621241000. Its totient is φ = 698717536.

The previous prime is 1397715113. The next prime is 1397715167. The reversal of 1397715128 is 8215177931.

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, 33743 + ... + 62721.

Almost surely, 2^1397715128 is an apocalyptic number.

It is an amenable number.

1397715128 is a deficient number, since it is larger than the sum of its proper divisors (1223525872).

1397715128 is a wasteful number, since it uses less digits than its factorization.

1397715128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35014 (or 35010 counting only the distinct ones).

The product of its digits is 105840, while the sum is 44.

The square root of 1397715128 is about 37386.0285133364. The cubic root of 1397715128 is about 1118.0800247377.

The spelling of 1397715128 in words is "one billion, three hundred ninety-seven million, seven hundred fifteen thousand, one hundred twenty-eight".