64387900 has 18 divisors (see below), whose sum is σ = 139721960. Its totient is φ = 25755120.

The previous prime is 64387889. The next prime is 64387901. The reversal of 64387900 is 978346.

It is a self number, because there is not a number n which added to its sum of digits gives 64387900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64387901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321840 + ... + 322039.

Almost surely, 2^64387900 is an apocalyptic number.

It is an amenable number.

64387900 is an abundant number, since it is smaller than the sum of its proper divisors (75334060).

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

64387900 is a wasteful number, since it uses less digits than its factorization.

64387900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643893 (or 643886 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 64387900 is about 8024.2071259409. The cubic root of 64387900 is about 400.8064978103.

The spelling of 64387900 in words is "sixty-four million, three hundred eighty-seven thousand, nine hundred".