189914220 has 144 divisors (see below), whose sum is σ = 623750400. Its totient is φ = 48413376.

The previous prime is 189914213. The next prime is 189914227. The reversal of 189914220 is 22419981.

It is an interprime number because it is at equal distance from previous prime (189914213) and next prime (189914227).

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

It is not an unprimeable number, because it can be changed into a prime (189914227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110931 + ... + 112629.

It is an arithmetic number, because the mean of its divisors is an integer number (4331600).

Almost surely, 2^189914220 is an apocalyptic number.

189914220 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 189914220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311875200).

189914220 is an abundant number, since it is smaller than the sum of its proper divisors (433836180).

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

189914220 is a wasteful number, since it uses less digits than its factorization.

189914220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 189914220 is about 13780.9368331765. The cubic root of 189914220 is about 574.8031790132.

The spelling of 189914220 in words is "one hundred eighty-nine million, nine hundred fourteen thousand, two hundred twenty".