162138640 has 20 divisors (see below), whose sum is σ = 376972524. Its totient is φ = 64855424.

The previous prime is 162138631. The next prime is 162138677. The reversal of 162138640 is 46831261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31539456 + 130599184 = 5616^2 + 11428^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 1013287 + ... + 1013446.

Almost surely, 2^162138640 is an apocalyptic number.

162138640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162138640 is an abundant number, since it is smaller than the sum of its proper divisors (214833884).

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

162138640 is a wasteful number, since it uses less digits than its factorization.

162138640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026746 (or 2026740 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 162138640 is about 12733.3671901819. The cubic root of 162138640 is about 545.2916431379.

The spelling of 162138640 in words is "one hundred sixty-two million, one hundred thirty-eight thousand, six hundred forty".