189217080 has 128 divisors (see below), whose sum is σ = 679291200. Its totient is φ = 46573056.

The previous prime is 189217079. The next prime is 189217081. The reversal of 189217080 is 80712981.

189217080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189217079) and next prime (189217081).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189217081) 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, 7302 + ... + 20778.

Almost surely, 2^189217080 is an apocalyptic number.

189217080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189217080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339645600).

189217080 is an abundant number, since it is smaller than the sum of its proper divisors (490074120).

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

189217080 is a wasteful number, since it uses less digits than its factorization.

189217080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13510 (or 13500 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 189217080 is about 13755.6199424090. The cubic root of 189217080 is about 574.0989845765.

The spelling of 189217080 in words is "one hundred eighty-nine million, two hundred seventeen thousand, eighty".