189876798 has 56 divisors (see below), whose sum is σ = 440907456. Its totient is φ = 61236000.

The previous prime is 189876779. The next prime is 189876839. The reversal of 189876798 is 897678981.

189876798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 43098 + ... + 47298.

Almost surely, 2^189876798 is an apocalyptic number.

189876798 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 189876798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220453728).

189876798 is an abundant number, since it is smaller than the sum of its proper divisors (251030658).

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

189876798 is an equidigital number, since it uses as much as digits as its factorization.

189876798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252 (or 4237 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The square root of 189876798 is about 13779.5790211457. The cubic root of 189876798 is about 574.7654221467.

The spelling of 189876798 in words is "one hundred eighty-nine million, eight hundred seventy-six thousand, seven hundred ninety-eight".