64400750 has 64 divisors (see below), whose sum is σ = 126741888. Its totient is φ = 24480000.

The previous prime is 64400729. The next prime is 64400761. The reversal of 64400750 is 5700446.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 625199 + ... + 625301.

It is an arithmetic number, because the mean of its divisors is an integer number (1980342).

Almost surely, 2^64400750 is an apocalyptic number.

64400750 is a deficient number, since it is larger than the sum of its proper divisors (62341138).

64400750 is a wasteful number, since it uses less digits than its factorization.

64400750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 64400750 is about 8025.0077881582. The cubic root of 64400750 is about 400.8331592426.

The spelling of 64400750 in words is "sixty-four million, four hundred thousand, seven hundred fifty".