640362000 has 80 divisors (see below), whose sum is σ = 2064546432. Its totient is φ = 170761600.

The previous prime is 640361999. The next prime is 640362007. The reversal of 640362000 is 263046.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (640362007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47364 + ... + 59363.

Almost surely, 2^640362000 is an apocalyptic number.

640362000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640362000 is an abundant number, since it is smaller than the sum of its proper divisors (1424184432).

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

640362000 is a wasteful number, since it uses less digits than its factorization.

640362000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106753 (or 106737 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 640362000 is about 25305.3749231265. The cubic root of 640362000 is about 861.9363256709.

The spelling of 640362000 in words is "six hundred forty million, three hundred sixty-two thousand".