189000042 has 64 divisors (see below), whose sum is σ = 473140224. Its totient is φ = 48896640.

The previous prime is 189000041. The next prime is 189000043. The reversal of 189000042 is 240000981.

It is an interprime number because it is at equal distance from previous prime (189000041) and next prime (189000043).

It is a junction number, because it is equal to n+sod(n) for n = 188999976 and 189000021.

It is not an unprimeable number, because it can be changed into a prime (189000041) 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, 143953 + ... + 145259.

It is an arithmetic number, because the mean of its divisors is an integer number (7392816).

Almost surely, 2^189000042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189000042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236570112).

189000042 is an abundant number, since it is smaller than the sum of its proper divisors (284140182).

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

189000042 is a wasteful number, since it uses less digits than its factorization.

189000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 189000042 is about 13747.7286123927. The cubic root of 189000042 is about 573.8793973413.

The spelling of 189000042 in words is "one hundred eighty-nine million, forty-two", and thus it is an aban number.