64608444 has 18 divisors (see below), whose sum is σ = 163315880. Its totient is φ = 21536136.

The previous prime is 64608437. The next prime is 64608461. The reversal of 64608444 is 44480646.

64608444 is a `hidden beast` number, since 6 + 4 + 608 + 4 + 44 = 666.

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

It is a super-2 number, since 2×64608444² = 8348502072202272, which contains 22 as substring.

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: 1794679 = 64608444 / (6 + 4 + 6 + 0 + 8 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 64608399 and 64608408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897304 + ... + 897375.

Almost surely, 2^64608444 is an apocalyptic number.

It is an amenable number.

64608444 is an abundant number, since it is smaller than the sum of its proper divisors (98707436).

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

64608444 is a wasteful number, since it uses less digits than its factorization.

64608444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794689 (or 1794684 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 64608444 is about 8037.9377952308. The cubic root of 64608444 is about 401.2635957777.

The spelling of 64608444 in words is "sixty-four million, six hundred eight thousand, four hundred forty-four".