199648644 has 48 divisors (see below), whose sum is σ = 518992320. Its totient is φ = 59310720.

The previous prime is 199648607. The next prime is 199648693. The reversal of 199648644 is 446846991.

199648644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17542 + ... + 26589.

It is an arithmetic number, because the mean of its divisors is an integer number (10812340).

Almost surely, 2^199648644 is an apocalyptic number.

It is an amenable number.

199648644 is an abundant number, since it is smaller than the sum of its proper divisors (319343676).

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

199648644 is a wasteful number, since it uses less digits than its factorization.

199648644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44180 (or 44178 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 199648644 is about 14129.7078526062. The cubic root of 199648644 is about 584.4608898472.

The spelling of 199648644 in words is "one hundred ninety-nine million, six hundred forty-eight thousand, six hundred forty-four".