640182700 has 18 divisors (see below), whose sum is σ = 1389196676. Its totient is φ = 256073040.

The previous prime is 640182691. The next prime is 640182703. The reversal of 640182700 is 7281046.

It is not an unprimeable number, because it can be changed into a prime (640182703) 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 5 ways as a sum of consecutive naturals, for example, 3200814 + ... + 3201013.

Almost surely, 2^640182700 is an apocalyptic number.

It is an amenable number.

640182700 is an abundant number, since it is smaller than the sum of its proper divisors (749013976).

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

640182700 is a wasteful number, since it uses less digits than its factorization.

640182700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401841 (or 6401834 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 640182700 is about 25301.8319494854. The cubic root of 640182700 is about 861.8558713813.

The spelling of 640182700 in words is "six hundred forty million, one hundred eighty-two thousand, seven hundred".