64390744 has 16 divisors (see below), whose sum is σ = 131708520. Its totient is φ = 29268480.

The previous prime is 64390741. The next prime is 64390763. The reversal of 64390744 is 44709346.

64390744 is nontrivially palindromic in base 9.

64390744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×64390744⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64390741) 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, 365769 + ... + 365944.

Almost surely, 2^64390744 is an apocalyptic number.

It is an amenable number.

64390744 is an abundant number, since it is smaller than the sum of its proper divisors (67317776).

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

64390744 is a wasteful number, since it uses less digits than its factorization.

64390744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731730 (or 731726 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 64390744 is about 8024.3843377545. The cubic root of 64390744 is about 400.8123989030.

The spelling of 64390744 in words is "sixty-four million, three hundred ninety thousand, seven hundred forty-four".