189822720 has 72 divisors (see below), whose sum is σ = 606258576. Its totient is φ = 50618368.

The previous prime is 189822653. The next prime is 189822739. The reversal of 189822720 is 27228981.

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 7 ways as a sum of consecutive naturals, for example, 20877 + ... + 28556.

It is an arithmetic number, because the mean of its divisors is an integer number (8420258).

Almost surely, 2^189822720 is an apocalyptic number.

189822720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189822720 is an abundant number, since it is smaller than the sum of its proper divisors (416435856).

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

189822720 is an equidigital number, since it uses as much as digits as its factorization.

189822720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49457 (or 49443 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 189822720 is about 13777.6166298820. The cubic root of 189822720 is about 574.7108514705.

The spelling of 189822720 in words is "one hundred eighty-nine million, eight hundred twenty-two thousand, seven hundred twenty".