64240344 has 64 divisors (see below), whose sum is σ = 203942400. Its totient is φ = 18353952.

The previous prime is 64240271. The next prime is 64240361. The reversal of 64240344 is 44304246.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19732 + ... + 22755.

It is an arithmetic number, because the mean of its divisors is an integer number (3186600).

Almost surely, 2^64240344 is an apocalyptic number.

It is an amenable number.

64240344 is an abundant number, since it is smaller than the sum of its proper divisors (139702056).

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

64240344 is a wasteful number, since it uses less digits than its factorization.

64240344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42509 (or 42499 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64240344 is about 8015.0074235773. The cubic root of 64240344 is about 400.5000911781.

The spelling of 64240344 in words is "sixty-four million, two hundred forty thousand, three hundred forty-four".