189777384 has 64 divisors (see below), whose sum is σ = 532440000. Its totient is φ = 62625600.

The previous prime is 189777383. The next prime is 189777431. The reversal of 189777384 is 483777981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 189777384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189777383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17467 + ... + 26165.

It is an arithmetic number, because the mean of its divisors is an integer number (8319375).

Almost surely, 2^189777384 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 189777384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266220000).

189777384 is an abundant number, since it is smaller than the sum of its proper divisors (342662616).

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

189777384 is a wasteful number, since it uses less digits than its factorization.

189777384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8815 (or 8805 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 189777384 is about 13775.9712543254. The cubic root of 189777384 is about 574.6650944510.

The spelling of 189777384 in words is "one hundred eighty-nine million, seven hundred seventy-seven thousand, three hundred eighty-four".