189299280 has 80 divisors (see below), whose sum is σ = 617728320. Its totient is φ = 47821824.

The previous prime is 189299273. The next prime is 189299281. The reversal of 189299280 is 82992981.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189299281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16197 + ... + 25316.

It is an arithmetic number, because the mean of its divisors is an integer number (7721604).

Almost surely, 2^189299280 is an apocalyptic number.

189299280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189299280 is an abundant number, since it is smaller than the sum of its proper divisors (428429040).

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

189299280 is a wasteful number, since it uses less digits than its factorization.

189299280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41548 (or 41542 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 189299280 is about 13758.6074876784. The cubic root of 189299280 is about 574.1821062210.

The spelling of 189299280 in words is "one hundred eighty-nine million, two hundred ninety-nine thousand, two hundred eighty".