64400304 has 40 divisors (see below), whose sum is σ = 167935680. Its totient is φ = 21264448.

The previous prime is 64400279. The next prime is 64400321. The reversal of 64400304 is 40300446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134 + ... + 11405.

It is an arithmetic number, because the mean of its divisors is an integer number (4198392).

Almost surely, 2^64400304 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 64400304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83967840).

64400304 is an abundant number, since it is smaller than the sum of its proper divisors (103535376).

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

64400304 is a wasteful number, since it uses less digits than its factorization.

64400304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657 (or 12651 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 64400304 is about 8024.9799999751. The cubic root of 64400304 is about 400.8322339325.

The spelling of 64400304 in words is "sixty-four million, four hundred thousand, three hundred four".