189492438 has 72 divisors (see below), whose sum is σ = 424622952. Its totient is φ = 56177408.

The previous prime is 189492427. The next prime is 189492439. The reversal of 189492438 is 834294981.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189492439) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4031731 + ... + 4031777.

It is an arithmetic number, because the mean of its divisors is an integer number (5897541).

Almost surely, 2^189492438 is an apocalyptic number.

189492438 is an abundant number, since it is smaller than the sum of its proper divisors (235130514).

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

189492438 is a wasteful number, since it uses less digits than its factorization.

189492438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 98 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 189492438 is about 13765.6252309875. The cubic root of 189492438 is about 574.3773352886.

The spelling of 189492438 in words is "one hundred eighty-nine million, four hundred ninety-two thousand, four hundred thirty-eight".