189049280 has 112 divisors (see below), whose sum is σ = 528620736. Its totient is φ = 63037440.

The previous prime is 189049247. The next prime is 189049321. The reversal of 189049280 is 82940981.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81740 + ... + 84020.

It is an arithmetic number, because the mean of its divisors is an integer number (4719828).

Almost surely, 2^189049280 is an apocalyptic number.

189049280 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 189049280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264310368).

189049280 is an abundant number, since it is smaller than the sum of its proper divisors (339571456).

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

189049280 is a wasteful number, since it uses less digits than its factorization.

189049280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 189049280 is about 13749.5192643234. The cubic root of 189049280 is about 573.9292284066.

The spelling of 189049280 in words is "one hundred eighty-nine million, forty-nine thousand, two hundred eighty".