64641304 has 32 divisors (see below), whose sum is σ = 149173920. Its totient is φ = 25572096.

The previous prime is 64641301. The next prime is 64641307. The reversal of 64641304 is 40314646.

It is a happy number.

64641304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64641301) and next prime (64641307).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64641301) 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 7 ways as a sum of consecutive naturals, for example, 43669 + ... + 45124.

It is an arithmetic number, because the mean of its divisors is an integer number (4661685).

Almost surely, 2^64641304 is an apocalyptic number.

It is an amenable number.

64641304 is an abundant number, since it is smaller than the sum of its proper divisors (84532616).

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

64641304 is a wasteful number, since it uses less digits than its factorization.

64641304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88819 (or 88815 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64641304 is about 8039.9815920187. The cubic root of 64641304 is about 401.3316121038.

The spelling of 64641304 in words is "sixty-four million, six hundred forty-one thousand, three hundred four".