199944028 has 12 divisors (see below), whose sum is σ = 351140440. Its totient is φ = 99618192.

The previous prime is 199943999. The next prime is 199944061. The reversal of 199944028 is 820449991.

It is a super-2 number, since 2×199944028² = 79955228665729568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87183 + ... + 89446.

Almost surely, 2^199944028 is an apocalyptic number.

It is an amenable number.

199944028 is a deficient number, since it is larger than the sum of its proper divisors (151196412).

199944028 is a wasteful number, since it uses less digits than its factorization.

199944028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176916 (or 176914 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 199944028 is about 14140.1565762194. The cubic root of 199944028 is about 584.7489881790.

The spelling of 199944028 in words is "one hundred ninety-nine million, nine hundred forty-four thousand, twenty-eight".