640412700 has 36 divisors (see below), whose sum is σ = 1852928280. Its totient is φ = 170776640.

The previous prime is 640412699. The next prime is 640412723. The reversal of 640412700 is 7214046.

640412700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1067055 + ... + 1067654.

It is an arithmetic number, because the mean of its divisors is an integer number (51470230).

Almost surely, 2^640412700 is an apocalyptic number.

640412700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640412700 is an abundant number, since it is smaller than the sum of its proper divisors (1212515580).

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

640412700 is a wasteful number, since it uses less digits than its factorization.

640412700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134726 (or 2134719 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 640412700 is about 25306.3766667613. The cubic root of 640412700 is about 861.9590727101.

Adding to 640412700 its reverse (7214046), we get a palindrome (647626746).

The spelling of 640412700 in words is "six hundred forty million, four hundred twelve thousand, seven hundred".