64944252 has 18 divisors (see below), whose sum is σ = 164164728. Its totient is φ = 21648072.

The previous prime is 64944251. The next prime is 64944277. The reversal of 64944252 is 25244946.

64944252 is a `hidden beast` number, since 649 + 4 + 4 + 2 + 5 + 2 = 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: 1804007 = 64944252 / (6 + 4 + 9 + 4 + 4 + 2 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64944251) 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, 901968 + ... + 902039.

Almost surely, 2^64944252 is an apocalyptic number.

It is an amenable number.

64944252 is an abundant number, since it is smaller than the sum of its proper divisors (99220476).

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

64944252 is a wasteful number, since it uses less digits than its factorization.

64944252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804017 (or 1804012 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 64944252 is about 8058.7996624808. The cubic root of 64944252 is about 401.9575955866.

The spelling of 64944252 in words is "sixty-four million, nine hundred forty-four thousand, two hundred fifty-two".