189642442 has 8 divisors (see below), whose sum is σ = 310324032. Its totient is φ = 86201100.

The previous prime is 189642433. The next prime is 189642443. The reversal of 189642442 is 244246981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 189642395 and 189642404.

It is not an unprimeable number, because it can be changed into a prime (189642443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4310034 + ... + 4310077.

It is an arithmetic number, because the mean of its divisors is an integer number (38790504).

Almost surely, 2^189642442 is an apocalyptic number.

189642442 is a deficient number, since it is larger than the sum of its proper divisors (120681590).

189642442 is a wasteful number, since it uses less digits than its factorization.

189642442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8620124.

The product of its digits is 110592, while the sum is 40.

The square root of 189642442 is about 13771.0726524843. The cubic root of 189642442 is about 574.5288561513.

The spelling of 189642442 in words is "one hundred eighty-nine million, six hundred forty-two thousand, four hundred forty-two".