64528427 has 4 divisors (see below), whose sum is σ = 67924680. Its totient is φ = 61132176.

The previous prime is 64528381. The next prime is 64528439. The reversal of 64528427 is 72482546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64528427 - 2¹⁴ = 64512043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64528127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698098 + ... + 1698135.

It is an arithmetic number, because the mean of its divisors is an integer number (16981170).

Almost surely, 2^64528427 is an apocalyptic number.

64528427 is a deficient number, since it is larger than the sum of its proper divisors (3396253).

64528427 is a wasteful number, since it uses less digits than its factorization.

64528427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396252.

The product of its digits is 107520, while the sum is 38.

The square root of 64528427 is about 8032.9587948651. The cubic root of 64528427 is about 401.0978735109.

The spelling of 64528427 in words is "sixty-four million, five hundred twenty-eight thousand, four hundred twenty-seven".