189481400 has 24 divisors (see below), whose sum is σ = 440544720. Its totient is φ = 75792480.

The previous prime is 189481399. The next prime is 189481423. The reversal of 189481400 is 4184981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 473504 + ... + 473903.

It is an arithmetic number, because the mean of its divisors is an integer number (18356030).

Almost surely, 2^189481400 is an apocalyptic number.

189481400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189481400 is an abundant number, since it is smaller than the sum of its proper divisors (251063320).

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

189481400 is a wasteful number, since it uses less digits than its factorization.

189481400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947423 (or 947414 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 189481400 is about 13765.2242989353. The cubic root of 189481400 is about 574.3661825126.

The spelling of 189481400 in words is "one hundred eighty-nine million, four hundred eighty-one thousand, four hundred".