64728552 has 32 divisors (see below), whose sum is σ = 184939200. Its totient is φ = 18493824.

The previous prime is 64728523. The next prime is 64728581. The reversal of 64728552 is 25582746.

It is an interprime number because it is at equal distance from previous prime (64728523) and next prime (64728581).

It is a self number, because there is not a number n which added to its sum of digits gives 64728552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192477 + ... + 192812.

It is an arithmetic number, because the mean of its divisors is an integer number (5779350).

Almost surely, 2^64728552 is an apocalyptic number.

It is an amenable number.

64728552 is an abundant number, since it is smaller than the sum of its proper divisors (120210648).

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

64728552 is a wasteful number, since it uses less digits than its factorization.

64728552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385305 (or 385301 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 64728552 is about 8045.4056454600. The cubic root of 64728552 is about 401.5120933979.

The spelling of 64728552 in words is "sixty-four million, seven hundred twenty-eight thousand, five hundred fifty-two".