64655328 has 48 divisors (see below), whose sum is σ = 178657920. Its totient is φ = 20416896.

The previous prime is 64655293. The next prime is 64655329. The reversal of 64655328 is 82355646.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×64655328² = 8360622877575168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64655329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15900 + ... + 19547.

It is an arithmetic number, because the mean of its divisors is an integer number (3722040).

Almost surely, 2^64655328 is an apocalyptic number.

It is an amenable number.

64655328 is an abundant number, since it is smaller than the sum of its proper divisors (114002592).

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

64655328 is a wasteful number, since it uses less digits than its factorization.

64655328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35479 (or 35471 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 64655328 is about 8040.8536860212. The cubic root of 64655328 is about 401.3606331126.

The spelling of 64655328 in words is "sixty-four million, six hundred fifty-five thousand, three hundred twenty-eight".