189775768 has 128 divisors (see below), whose sum is σ = 462672000. Its totient is φ = 70963200.

The previous prime is 189775759. The next prime is 189775771. The reversal of 189775768 is 867577981.

It is a Harshad number since it is a multiple of its sum of digits (58).

Its product of digits (5927040) is a multiple of the sum of its prime factors (245).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1878918 + ... + 1879018.

It is an arithmetic number, because the mean of its divisors is an integer number (3614625).

Almost surely, 2^189775768 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 189775768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231336000).

189775768 is an abundant number, since it is smaller than the sum of its proper divisors (272896232).

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

189775768 is a wasteful number, since it uses less digits than its factorization.

189775768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 58.

The square root of 189775768 is about 13775.9126013488. The cubic root of 189775768 is about 574.6634633093.

The spelling of 189775768 in words is "one hundred eighty-nine million, seven hundred seventy-five thousand, seven hundred sixty-eight".