189377280 has 216 divisors, whose sum is σ = 694485792. Its totient is φ = 47480832.

The previous prime is 189377273. The next prime is 189377291. The reversal of 189377280 is 82773981.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 195357 + ... + 196323.

It is an arithmetic number, because the mean of its divisors is an integer number (3215212).

Almost surely, 2^189377280 is an apocalyptic number.

189377280 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 189377280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347242896).

189377280 is an abundant number, since it is smaller than the sum of its proper divisors (505108512).

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

189377280 is a wasteful number, since it uses less digits than its factorization.

189377280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 189377280 is about 13761.4417849294. The cubic root of 189377280 is about 574.2609585272.

The spelling of 189377280 in words is "one hundred eighty-nine million, three hundred seventy-seven thousand, two hundred eighty".