640200486 has 16 divisors (see below), whose sum is σ = 1311630768. Its totient is φ = 208195200.

The previous prime is 640200479. The next prime is 640200487. The reversal of 640200486 is 684002046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640200487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300975 + ... + 1301466.

It is an arithmetic number, because the mean of its divisors is an integer number (81976923).

Almost surely, 2^640200486 is an apocalyptic number.

640200486 is an abundant number, since it is smaller than the sum of its proper divisors (671430282).

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

640200486 is a wasteful number, since it uses less digits than its factorization.

640200486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602487.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 640200486 is about 25302.1834235704. The cubic root of 640200486 is about 861.8638528666.

The spelling of 640200486 in words is "six hundred forty million, two hundred thousand, four hundred eighty-six".