64240072 has 16 divisors (see below), whose sum is σ = 129715740. Its totient is φ = 29649216.

The previous prime is 64240067. The next prime is 64240079. The reversal of 64240072 is 27004246.

64240072 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 64224196 + 15876 = 8014^2 + 126^2 .

It is not an unprimeable number, because it can be changed into a prime (64240079) 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, 308743 + ... + 308950.

Almost surely, 2^64240072 is an apocalyptic number.

It is an amenable number.

64240072 is an abundant number, since it is smaller than the sum of its proper divisors (65475668).

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

64240072 is a wasteful number, since it uses less digits than its factorization.

64240072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617712 (or 617708 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 64240072 is about 8014.9904553904. The cubic root of 64240072 is about 400.4995259249.

The spelling of 64240072 in words is "sixty-four million, two hundred forty thousand, seventy-two".