479881644 has 72 divisors (see below), whose sum is σ = 1303236144. Its totient is φ = 136857600.

The previous prime is 479881621. The next prime is 479881657. The reversal of 479881644 is 446188974.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 14964 + ... + 34404.

It is an arithmetic number, because the mean of its divisors is an integer number (18100502).

Almost surely, 2^479881644 is an apocalyptic number.

479881644 is a gapful number since it is divisible by the number (44) 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 479881644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651618072).

479881644 is an abundant number, since it is smaller than the sum of its proper divisors (823354500).

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

479881644 is a wasteful number, since it uses less digits than its factorization.

479881644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19487 (or 19474 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 479881644 is about 21906.2010398882. The cubic root of 479881644 is about 782.9091690445.

The spelling of 479881644 in words is "four hundred seventy-nine million, eight hundred eighty-one thousand, six hundred forty-four".