64404384 has 96 divisors (see below), whose sum is σ = 187246080. Its totient is φ = 19219200.

The previous prime is 64404371. The next prime is 64404413. The reversal of 64404384 is 48340446.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74547 + ... + 75405.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^64404384 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 64404384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93623040).

64404384 is an abundant number, since it is smaller than the sum of its proper divisors (122841696).

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

64404384 is a wasteful number, since it uses less digits than its factorization.

64404384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The square root of 64404384 is about 8025.2342021900. The cubic root of 64404384 is about 400.8406984939.

The spelling of 64404384 in words is "sixty-four million, four hundred four thousand, three hundred eighty-four".