189000030 has 32 divisors (see below), whose sum is σ = 477475200. Its totient is φ = 47747232.

The previous prime is 189000023. The next prime is 189000041. The reversal of 189000030 is 30000981.

It is a super-2 number, since 2×189000030² = 71442022680001800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 188999970 and 189000006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165220 + ... + 166359.

It is an arithmetic number, because the mean of its divisors is an integer number (14921100).

Almost surely, 2^189000030 is an apocalyptic number.

189000030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189000030 is an abundant number, since it is smaller than the sum of its proper divisors (288475170).

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

189000030 is a wasteful number, since it uses less digits than its factorization.

189000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331608.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 189000030 is about 13747.7281759569. The cubic root of 189000030 is about 573.8793851957.

The spelling of 189000030 in words is "one hundred eighty-nine million, thirty", and thus it is an aban number.