64579944 has 128 divisors (see below), whose sum is σ = 196116480. Its totient is φ = 17452800.

The previous prime is 64579939. The next prime is 64579969. The reversal of 64579944 is 44997546.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64579893 and 64579902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106089 + ... + 106695.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^64579944 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 64579944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98058240).

64579944 is an abundant number, since it is smaller than the sum of its proper divisors (131536536).

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

64579944 is a wasteful number, since it uses less digits than its factorization.

64579944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 667 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 64579944 is about 8036.1647568974. The cubic root of 64579944 is about 401.2045854599.

The spelling of 64579944 in words is "sixty-four million, five hundred seventy-nine thousand, nine hundred forty-four".