500161620 has 72 divisors (see below), whose sum is σ = 1629107424. Its totient is φ = 114321984.

The previous prime is 500161609. The next prime is 500161663. The reversal of 500161620 is 26161005.

It is a happy number.

It is a super-2 number, since 2×500161620² = 500323292242048800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82122 + ... + 88001.

It is an arithmetic number, because the mean of its divisors is an integer number (22626492).

Almost surely, 2^500161620 is an apocalyptic number.

It is an amenable number.

500161620 is an abundant number, since it is smaller than the sum of its proper divisors (1128945804).

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

500161620 is a wasteful number, since it uses less digits than its factorization.

500161620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170149 (or 170140 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 500161620 is about 22364.2934160684. The cubic root of 500161620 is about 793.7860353574.

The spelling of 500161620 in words is "five hundred million, one hundred sixty-one thousand, six hundred twenty".