189779058 has 96 divisors (see below), whose sum is σ = 519566400. Its totient is φ = 51020928.

The previous prime is 189779053. The next prime is 189779069. The reversal of 189779058 is 850977981.

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

It is a junction number, because it is equal to n+sod(n) for n = 189778995 and 189779013.

It is not an unprimeable number, because it can be changed into a prime (189779053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42873 + ... + 47091.

It is an arithmetic number, because the mean of its divisors is an integer number (5412150).

Almost surely, 2^189779058 is an apocalyptic number.

189779058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189779058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259783200).

189779058 is an abundant number, since it is smaller than the sum of its proper divisors (329787342).

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

189779058 is a wasteful number, since it uses less digits than its factorization.

189779058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 189779058 is about 13776.0320121579. The cubic root of 189779058 is about 574.6667841264. Note that the first 3 decimals are identical.

The spelling of 189779058 in words is "one hundred eighty-nine million, seven hundred seventy-nine thousand, fifty-eight".