189217854 has 48 divisors (see below), whose sum is σ = 496106208. Its totient is φ = 50881536.

The previous prime is 189217843. The next prime is 189217859. The reversal of 189217854 is 458712981.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189217859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42027 + ... + 46310.

It is an arithmetic number, because the mean of its divisors is an integer number (10335546).

Almost surely, 2^189217854 is an apocalyptic number.

189217854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

189217854 is an abundant number, since it is smaller than the sum of its proper divisors (306888354).

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

189217854 is a wasteful number, since it uses less digits than its factorization.

189217854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88369 (or 88366 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 189217854 is about 13755.6480763358. The cubic root of 189217854 is about 574.0997673670.

The spelling of 189217854 in words is "one hundred eighty-nine million, two hundred seventeen thousand, eight hundred fifty-four".