500978640 has 160 divisors (see below), whose sum is σ = 1655894016. Its totient is φ = 125002240.

The previous prime is 500978591. The next prime is 500978641. The reversal of 500978640 is 46879005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500978641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258475 + ... + 260405.

Almost surely, 2^500978640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 500978640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827947008).

500978640 is an abundant number, since it is smaller than the sum of its proper divisors (1154915376).

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

500978640 is a wasteful number, since it uses less digits than its factorization.

500978640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 500978640 is about 22382.5521333024. The cubic root of 500978640 is about 794.2180198925.

The spelling of 500978640 in words is "five hundred million, nine hundred seventy-eight thousand, six hundred forty".