189898580 has 48 divisors (see below), whose sum is σ = 423239040. Its totient is φ = 71415168.

The previous prime is 189898561. The next prime is 189898589. The reversal of 189898580 is 85898981.

It is a super-2 number, since 2×189898580² = 72122941372032800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189898589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23642 + ... + 30638.

It is an arithmetic number, because the mean of its divisors is an integer number (8817480).

Almost surely, 2^189898580 is an apocalyptic number.

189898580 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 189898580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211619520).

189898580 is an abundant number, since it is smaller than the sum of its proper divisors (233340460).

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

189898580 is a wasteful number, since it uses less digits than its factorization.

189898580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7088 (or 7086 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 56.

The square root of 189898580 is about 13780.3693709566. The cubic root of 189898580 is about 574.7873996638.

It can be divided in two parts, 1898 and 98580, that multiplied together give a triangular number (187104840 = T₁₉₃₄₄).

The spelling of 189898580 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, five hundred eighty".