64404 has 18 divisors (see below), whose sum is σ = 162890. Its totient is φ = 21456.

The previous prime is 64403. The next prime is 64433. The reversal of 64404 is 40446.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 900 = 252^2 + 30^2 .

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 (18).

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64404.

It is not an unprimeable number, because it can be changed into a prime (64403) 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, 859 + ... + 930.

2⁶⁴⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

64404 is an abundant number, since it is smaller than the sum of its proper divisors (98486).

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

64404 is a wasteful number, since it uses less digits than its factorization.

64404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 64404 is about 253.7794317907. The cubic root of 64404 is about 40.0839901845.

The spelling of 64404 in words is "sixty-four thousand, four hundred four".