640377100 has 36 divisors (see below), whose sum is σ = 1515949848. Its totient is φ = 232864000.

The previous prime is 640377079. The next prime is 640377107. The reversal of 640377100 is 1773046.

It is not an unprimeable number, because it can be changed into a prime (640377107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289981 + ... + 292180.

It is an arithmetic number, because the mean of its divisors is an integer number (42109718).

Almost surely, 2^640377100 is an apocalyptic number.

It is an amenable number.

640377100 is an abundant number, since it is smaller than the sum of its proper divisors (875572748).

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

640377100 is a wasteful number, since it uses less digits than its factorization.

640377100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582186 (or 582179 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 640377100 is about 25305.6732769551. The cubic root of 640377100 is about 861.9431005557.

The spelling of 640377100 in words is "six hundred forty million, three hundred seventy-seven thousand, one hundred".