189495140 has 36 divisors (see below), whose sum is σ = 405710004. Its totient is φ = 74345856.

The previous prime is 189495127. The next prime is 189495149. The reversal of 189495140 is 41594981.

It can be written as a sum of positive squares in 6 ways, for example, as 43375396 + 146119744 = 6586^2 + 12088^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (189495149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54494 + ... + 57866.

Almost surely, 2^189495140 is an apocalyptic number.

189495140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189495140 is an abundant number, since it is smaller than the sum of its proper divisors (216214864).

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

189495140 is a wasteful number, since it uses less digits than its factorization.

189495140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488 (or 3433 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 189495140 is about 13765.7233736553. The cubic root of 189495140 is about 574.3800653187.

The spelling of 189495140 in words is "one hundred eighty-nine million, four hundred ninety-five thousand, one hundred forty".