189857888 has 96 divisors (see below), whose sum is σ = 427327488. Its totient is φ = 82252800.

The previous prime is 189857869. The next prime is 189857897. The reversal of 189857888 is 888758981.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 189857888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385756 + ... + 1385892.

It is an arithmetic number, because the mean of its divisors is an integer number (4451328).

Almost surely, 2^189857888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189857888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213663744).

189857888 is an abundant number, since it is smaller than the sum of its proper divisors (237469600).

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

189857888 is a wasteful number, since it uses less digits than its factorization.

189857888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 308 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 62.

The square root of 189857888 is about 13778.8928437665. The cubic root of 189857888 is about 574.7463410459.

The spelling of 189857888 in words is "one hundred eighty-nine million, eight hundred fifty-seven thousand, eight hundred eighty-eight".