1397359528 has 16 divisors (see below), whose sum is σ = 2621092500. Its totient is φ = 698401536.

The previous prime is 1397359507. The next prime is 1397359583. The reversal of 1397359528 is 8259537931.

It can be written as a sum of positive squares in 2 ways, for example, as 1300179364 + 97180164 = 36058^2 + 9858^2 .

It is a super-2 number, since 2×1397359528² = 3905227300984765568, which contains 22 as substring.

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, 12603 + ... + 54346.

Almost surely, 2^1397359528 is an apocalyptic number.

It is an amenable number.

1397359528 is a deficient number, since it is larger than the sum of its proper divisors (1223732972).

1397359528 is a wasteful number, since it uses less digits than its factorization.

1397359528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69564 (or 69560 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 52.

The square root of 1397359528 is about 37381.2724235010. The cubic root of 1397359528 is about 1117.9851978374.

The spelling of 1397359528 in words is "one billion, three hundred ninety-seven million, three hundred fifty-nine thousand, five hundred twenty-eight".