64884644 has 36 divisors (see below), whose sum is σ = 125984880. Its totient is φ = 28996560.

The previous prime is 64884637. The next prime is 64884661. The reversal of 64884644 is 44648846.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 64884595 and 64884604.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466727 + ... + 466865.

It is an arithmetic number, because the mean of its divisors is an integer number (3499580).

Almost surely, 2^64884644 is an apocalyptic number.

It is an amenable number.

64884644 is a deficient number, since it is larger than the sum of its proper divisors (61100236).

64884644 is a wasteful number, since it uses less digits than its factorization.

64884644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 255 counting only the distinct ones).

The product of its digits is 589824, while the sum is 44.

The square root of 64884644 is about 8055.1004959591. The cubic root of 64884644 is about 401.8345812486.

The spelling of 64884644 in words is "sixty-four million, eight hundred eighty-four thousand, six hundred forty-four".