1657888968 has 32 divisors (see below), whose sum is σ = 4157264160. Its totient is φ = 550957440.

The previous prime is 1657888963. The next prime is 1657889027. The reversal of 1657888968 is 8698887561.

It is a super-2 number, since 2×1657888968² = 5497191660432210048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1657888899 and 1657888908.

It is not an unprimeable number, because it can be changed into a prime (1657888961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96405 + ... + 112292.

It is an arithmetic number, because the mean of its divisors is an integer number (129914505).

Almost surely, 2^1657888968 is an apocalyptic number.

It is an amenable number.

1657888968 is an abundant number, since it is smaller than the sum of its proper divisors (2499375192).

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

1657888968 is a wasteful number, since it uses less digits than its factorization.

1657888968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209037 (or 209033 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 66.

The square root of 1657888968 is about 40717.1827119706. The cubic root of 1657888968 is about 1183.5460142400.

The spelling of 1657888968 in words is "one billion, six hundred fifty-seven million, eight hundred eighty-eight thousand, nine hundred sixty-eight".