64528272 has 40 divisors (see below), whose sum is σ = 185221280. Its totient is φ = 21509280.

The previous prime is 64528253. The next prime is 64528273. The reversal of 64528272 is 27282546.

64528272 is a `hidden beast` number, since 64 + 528 + 2 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64528273) 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, 74254 + ... + 75117.

It is an arithmetic number, because the mean of its divisors is an integer number (4630532).

Almost surely, 2^64528272 is an apocalyptic number.

It is an amenable number.

64528272 is an abundant number, since it is smaller than the sum of its proper divisors (120693008).

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

64528272 is a wasteful number, since it uses less digits than its factorization.

64528272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149388 (or 149376 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 64528272 is about 8032.9491471066. The cubic root of 64528272 is about 401.0975523593.

The spelling of 64528272 in words is "sixty-four million, five hundred twenty-eight thousand, two hundred seventy-two".