189428400 has 180 divisors, whose sum is σ = 751378992. Its totient is φ = 43292160.

The previous prime is 189428387. The next prime is 189428417. The reversal of 189428400 is 4824981.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 35 ways as a sum of consecutive naturals, for example, 21442 + ... + 28958.

Almost surely, 2^189428400 is an apocalyptic number.

189428400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189428400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375689496).

189428400 is an abundant number, since it is smaller than the sum of its proper divisors (561950592).

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

189428400 is a wasteful number, since it uses less digits than its factorization.

189428400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548 (or 7534 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 189428400 is about 13763.2990231267. The cubic root of 189428400 is about 574.3126253712.

The spelling of 189428400 in words is "one hundred eighty-nine million, four hundred twenty-eight thousand, four hundred".