189427678 has 24 divisors (see below), whose sum is σ = 325909584. Its totient is φ = 82357440.

The previous prime is 189427673. The next prime is 189427691. The reversal of 189427678 is 876724981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189427673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11451 + ... + 22582.

It is an arithmetic number, because the mean of its divisors is an integer number (13579566).

Almost surely, 2^189427678 is an apocalyptic number.

189427678 is a deficient number, since it is larger than the sum of its proper divisors (136481906).

189427678 is a wasteful number, since it uses less digits than its factorization.

189427678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34080 (or 34069 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 189427678 is about 13763.2727939251. The cubic root of 189427678 is about 574.3118957125.

The spelling of 189427678 in words is "one hundred eighty-nine million, four hundred twenty-seven thousand, six hundred seventy-eight".