479990640 has 160 divisors (see below), whose sum is σ = 1541615616. Its totient is φ = 123448320.

The previous prime is 479990627. The next prime is 479990659. The reversal of 479990640 is 46099974.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 479990640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1695939 + ... + 1696221.

Almost surely, 2^479990640 is an apocalyptic number.

479990640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 479990640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770807808).

479990640 is an abundant number, since it is smaller than the sum of its proper divisors (1061624976).

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

479990640 is a wasteful number, since it uses less digits than its factorization.

479990640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 479990640 is about 21908.6886873678. The cubic root of 479990640 is about 782.9684388728.

The spelling of 479990640 in words is "four hundred seventy-nine million, nine hundred ninety thousand, six hundred forty".