189574938 has 64 divisors (see below), whose sum is σ = 483690240. Its totient is φ = 53913600.

The previous prime is 189574937. The next prime is 189574961. The reversal of 189574938 is 839475981.

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

It is not an unprimeable number, because it can be changed into a prime (189574933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90058 + ... + 92138.

It is an arithmetic number, because the mean of its divisors is an integer number (7557660).

Almost surely, 2^189574938 is an apocalyptic number.

189574938 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 189574938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241845120).

189574938 is an abundant number, since it is smaller than the sum of its proper divisors (294115302).

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

189574938 is a wasteful number, since it uses less digits than its factorization.

189574938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340 (or 2334 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 189574938 is about 13768.6214996273. The cubic root of 189574938 is about 574.4606794322.

The spelling of 189574938 in words is "one hundred eighty-nine million, five hundred seventy-four thousand, nine hundred thirty-eight".