189215544 has 32 divisors (see below), whose sum is σ = 540616320. Its totient is φ = 54061536.

The previous prime is 189215539. The next prime is 189215567. The reversal of 189215544 is 445512981.

189215544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562974 + ... + 563309.

It is an arithmetic number, because the mean of its divisors is an integer number (16894260).

Almost surely, 2^189215544 is an apocalyptic number.

189215544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

189215544 is an abundant number, since it is smaller than the sum of its proper divisors (351400776).

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

189215544 is a wasteful number, since it uses less digits than its factorization.

189215544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126299 (or 1126295 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The square root of 189215544 is about 13755.5641105699. The cubic root of 189215544 is about 574.0974311254.

The spelling of 189215544 in words is "one hundred eighty-nine million, two hundred fifteen thousand, five hundred forty-four".