640112844 has 24 divisors (see below), whose sum is σ = 1706967808. Its totient is φ = 182889360.

The previous prime is 640112843. The next prime is 640112861. The reversal of 640112844 is 448211046.

It is not an unprimeable number, because it can be changed into a prime (640112843) 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, 3810112 + ... + 3810279.

Almost surely, 2^640112844 is an apocalyptic number.

It is an amenable number.

640112844 is an abundant number, since it is smaller than the sum of its proper divisors (1066854964).

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

640112844 is a wasteful number, since it uses less digits than its factorization.

640112844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620405 (or 7620403 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 640112844 is about 25300.4514584226. The cubic root of 640112844 is about 861.8245220005.

The spelling of 640112844 in words is "six hundred forty million, one hundred twelve thousand, eight hundred forty-four".