1539397968 has 20 divisors (see below), whose sum is σ = 3976778208. Its totient is φ = 513132640.

The previous prime is 1539397967. The next prime is 1539397973. The reversal of 1539397968 is 8697939351.

It is a super-2 number, since 2×1539397968² = 4739492207765058048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539397967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16035348 + ... + 16035443.

Almost surely, 2^1539397968 is an apocalyptic number.

It is an amenable number.

1539397968 is an abundant number, since it is smaller than the sum of its proper divisors (2437380240).

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

1539397968 is a wasteful number, since it uses less digits than its factorization.

1539397968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32070802 (or 32070796 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 60.

The square root of 1539397968 is about 39235.1623929352. The cubic root of 1539397968 is about 1154.6498486943.

The spelling of 1539397968 in words is "one billion, five hundred thirty-nine million, three hundred ninety-seven thousand, nine hundred sixty-eight".