501039990 has 48 divisors (see below), whose sum is σ = 1421134416. Its totient is φ = 121464000.

The previous prime is 501039961. The next prime is 501039991. The reversal of 501039990 is 99930105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501039991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252061 + ... + 254040.

It is an arithmetic number, because the mean of its divisors is an integer number (29606967).

Almost surely, 2^501039990 is an apocalyptic number.

501039990 is an abundant number, since it is smaller than the sum of its proper divisors (920094426).

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

501039990 is a wasteful number, since it uses less digits than its factorization.

501039990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506125 (or 506122 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 501039990 is about 22383.9225784937. The cubic root of 501039990 is about 794.2504386311.

The spelling of 501039990 in words is "five hundred one million, thirty-nine thousand, nine hundred ninety".