64285728 has 48 divisors (see below), whose sum is σ = 181734336. Its totient is φ = 19779840.

The previous prime is 64285717. The next prime is 64285729. The reversal of 64285728 is 82758246.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64285728.

It is not an unprimeable number, because it can be changed into a prime (64285729) 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, 24508 + ... + 27003.

It is an arithmetic number, because the mean of its divisors is an integer number (3786132).

Almost surely, 2^64285728 is an apocalyptic number.

It is an amenable number.

64285728 is an abundant number, since it is smaller than the sum of its proper divisors (117448608).

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

64285728 is a wasteful number, since it uses less digits than its factorization.

64285728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51537 (or 51529 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 64285728 is about 8017.8381126087. The cubic root of 64285728 is about 400.5943830013.

The spelling of 64285728 in words is "sixty-four million, two hundred eighty-five thousand, seven hundred twenty-eight".