189507140 has 48 divisors (see below), whose sum is σ = 421848000. Its totient is φ = 71309952.

The previous prime is 189507139. The next prime is 189507161. The reversal of 189507140 is 41705981.

It is a super-2 number, since 2×189507140² = 71825912221959200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189507140.

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 15 ways as a sum of consecutive naturals, for example, 54947 + ... + 58293.

It is an arithmetic number, because the mean of its divisors is an integer number (8788500).

Almost surely, 2^189507140 is an apocalyptic number.

189507140 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 189507140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210924000).

189507140 is an abundant number, since it is smaller than the sum of its proper divisors (232340860).

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

189507140 is a wasteful number, since it uses less digits than its factorization.

189507140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524 (or 3522 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 189507140 is about 13766.1592319717. The cubic root of 189507140 is about 574.3921894912.

The spelling of 189507140 in words is "one hundred eighty-nine million, five hundred seven thousand, one hundred forty".