64247632 has 20 divisors (see below), whose sum is σ = 124887220. Its totient is φ = 32018688.

The previous prime is 64247621. The next prime is 64247639. The reversal of 64247632 is 23674246.

64247632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19571776 + 44675856 = 4424^2 + 6684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64247639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (6244361).

Almost surely, 2^64247632 is an apocalyptic number.

It is an amenable number.

64247632 is a deficient number, since it is larger than the sum of its proper divisors (60639588).

64247632 is a wasteful number, since it uses less digits than its factorization.

64247632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13150 (or 13144 counting only the distinct ones).

The product of its digits is 48384, while the sum is 34.

The square root of 64247632 is about 8015.4620577980. The cubic root of 64247632 is about 400.5152360446.

The spelling of 64247632 in words is "sixty-four million, two hundred forty-seven thousand, six hundred thirty-two".