189619938 has 48 divisors (see below), whose sum is σ = 445157856. Its totient is φ = 58101120.

The previous prime is 189619897. The next prime is 189619939. The reversal of 189619938 is 839916981.

189619938 is a `hidden beast` number, since 18 + 9 + 619 + 9 + 3 + 8 = 666.

189619938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189619939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5953 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (9274122).

Almost surely, 2^189619938 is an apocalyptic number.

189619938 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 189619938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222578928).

189619938 is an abundant number, since it is smaller than the sum of its proper divisors (255537918).

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

189619938 is a wasteful number, since it uses less digits than its factorization.

189619938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14479 (or 14476 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 189619938 is about 13770.2555531842. The cubic root of 189619938 is about 574.5061296830.

The spelling of 189619938 in words is "one hundred eighty-nine million, six hundred nineteen thousand, nine hundred thirty-eight".