64904224 has 144 divisors (see below), whose sum is σ = 167541696. Its totient is φ = 24460800.

The previous prime is 64904221. The next prime is 64904263. The reversal of 64904224 is 42240946.

64904224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64904221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914109 + ... + 914179.

It is an arithmetic number, because the mean of its divisors is an integer number (1163484).

Almost surely, 2^64904224 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 64904224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83770848).

64904224 is an abundant number, since it is smaller than the sum of its proper divisors (102637472).

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

64904224 is a wasteful number, since it uses less digits than its factorization.

64904224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64904224 is about 8056.3157832846. The cubic root of 64904224 is about 401.8749972306.

Subtracting from 64904224 its reverse (42240946), we obtain a triangular number (22663278 = T₆₇₃₂).

The spelling of 64904224 in words is "sixty-four million, nine hundred four thousand, two hundred twenty-four".