501995620 has 48 divisors (see below), whose sum is σ = 1219333248. Its totient is φ = 170035200.

The previous prime is 501995603. The next prime is 501995623. The reversal of 501995620 is 26599105.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 501995620.

It is not an unprimeable number, because it can be changed into a prime (501995623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9981 + ... + 33220.

It is an arithmetic number, because the mean of its divisors is an integer number (25402776).

Almost surely, 2^501995620 is an apocalyptic number.

It is an amenable number.

501995620 is an abundant number, since it is smaller than the sum of its proper divisors (717337628).

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

501995620 is a wasteful number, since it uses less digits than its factorization.

501995620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43300 (or 43298 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 501995620 is about 22405.2587577113. The cubic root of 501995620 is about 794.7550740037.

The spelling of 501995620 in words is "five hundred one million, nine hundred ninety-five thousand, six hundred twenty".