64404144 has 120 divisors (see below), whose sum is σ = 207715872. Its totient is φ = 18247680.

The previous prime is 64404139. The next prime is 64404173. The reversal of 64404144 is 44140446.

64404144 is a `hidden beast` number, since 644 + 0 + 4 + 14 + 4 = 666.

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, 182272 + ... + 182624.

Almost surely, 2^64404144 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 64404144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103857936).

64404144 is an abundant number, since it is smaller than the sum of its proper divisors (143311728).

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

64404144 is a wasteful number, since it uses less digits than its factorization.

64404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 64404144 is about 8025.2192493414. The cubic root of 64404144 is about 400.8402005884.

The spelling of 64404144 in words is "sixty-four million, four hundred four thousand, one hundred forty-four".