189978200 has 24 divisors (see below), whose sum is σ = 441699780. Its totient is φ = 75991200.

The previous prime is 189978149. The next prime is 189978203. The reversal of 189978200 is 2879981.

189978200 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189978203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 474746 + ... + 475145.

Almost surely, 2^189978200 is an apocalyptic number.

189978200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189978200 is an abundant number, since it is smaller than the sum of its proper divisors (251721580).

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

189978200 is a wasteful number, since it uses less digits than its factorization.

189978200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949907 (or 949898 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 189978200 is about 13783.2579602937. The cubic root of 189978200 is about 574.8677200436.

The spelling of 189978200 in words is "one hundred eighty-nine million, nine hundred seventy-eight thousand, two hundred".