640300982 has 4 divisors (see below), whose sum is σ = 960451476. Its totient is φ = 320150490.

The previous prime is 640300963. The next prime is 640300987. The reversal of 640300982 is 289003046.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640300987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160075244 + ... + 160075247.

It is an arithmetic number, because the mean of its divisors is an integer number (240112869).

Almost surely, 2^640300982 is an apocalyptic number.

640300982 is a deficient number, since it is larger than the sum of its proper divisors (320150494).

640300982 is a wasteful number, since it uses less digits than its factorization.

640300982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320150493.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 640300982 is about 25304.1692612107. The cubic root of 640300982 is about 861.9089477705.

The spelling of 640300982 in words is "six hundred forty million, three hundred thousand, nine hundred eighty-two".