189001088 has 64 divisors (see below), whose sum is σ = 387212400. Its totient is φ = 91865088.

The previous prime is 189001067. The next prime is 189001093. The reversal of 189001088 is 880100981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×189001088² = 71442822530367488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055783 + ... + 1055961.

Almost surely, 2^189001088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189001088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193606200).

189001088 is an abundant number, since it is smaller than the sum of its proper divisors (198211312).

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

189001088 is a wasteful number, since it uses less digits than its factorization.

189001088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 189001088 is about 13747.7666549880. The cubic root of 189001088 is about 573.8804560302.

The spelling of 189001088 in words is "one hundred eighty-nine million, one thousand, eighty-eight".