64387456 has 32 divisors (see below), whose sum is σ = 146598480. Its totient is φ = 27594240.

The previous prime is 64387451. The next prime is 64387481. The reversal of 64387456 is 65478346.

64387456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64387451) 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, 35035 + ... + 36826.

Almost surely, 2^64387456 is an apocalyptic number.

It is an amenable number.

64387456 is an abundant number, since it is smaller than the sum of its proper divisors (82211024).

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

64387456 is an equidigital number, since it uses as much as digits as its factorization.

64387456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71882 (or 71870 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 64387456 is about 8024.1794596083. The cubic root of 64387456 is about 400.8055765270.

The spelling of 64387456 in words is "sixty-four million, three hundred eighty-seven thousand, four hundred fifty-six".