189621522 has 48 divisors (see below), whose sum is σ = 440331840. Its totient is φ = 58820256.

The previous prime is 189621503. The next prime is 189621527. The reversal of 189621522 is 225126981.

189621522 is a `hidden beast` number, since 1 + 8 + 9 + 621 + 5 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (189621527) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9129 + ... + 21507.

It is an arithmetic number, because the mean of its divisors is an integer number (9173580).

Almost surely, 2^189621522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189621522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220165920).

189621522 is an abundant number, since it is smaller than the sum of its proper divisors (250710318).

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

189621522 is a wasteful number, since it uses less digits than its factorization.

189621522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12447 (or 12444 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 189621522 is about 13770.3130683365. The cubic root of 189621522 is about 574.5077294008.

The spelling of 189621522 in words is "one hundred eighty-nine million, six hundred twenty-one thousand, five hundred twenty-two".