63964044 has 18 divisors (see below), whose sum is σ = 161686980. Its totient is φ = 21321336.

The previous prime is 63964037. The next prime is 63964049. The reversal of 63964044 is 44046936.

63964044 is a `hidden beast` number, since 6 + 3 + 9 + 640 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1776779 = 63964044 / (6 + 3 + 9 + 6 + 4 + 0 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (63964049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 888354 + ... + 888425.

It is an arithmetic number, because the mean of its divisors is an integer number (8982610).

Almost surely, 2^63964044 is an apocalyptic number.

It is an amenable number.

63964044 is an abundant number, since it is smaller than the sum of its proper divisors (97722936).

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

63964044 is a wasteful number, since it uses less digits than its factorization.

63964044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776789 (or 1776784 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 63964044 is about 7997.7524342780. The cubic root of 63964044 is about 399.9250776341.

It can be divided in two parts, 6396 and 4044, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 63964044 in words is "sixty-three million, nine hundred sixty-four thousand, forty-four".