189208540 has 48 divisors (see below), whose sum is σ = 403359264. Its totient is φ = 74547200.

The previous prime is 189208529. The next prime is 189208541. The reversal of 189208540 is 45802981.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 189208540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189208541) 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, 673200 + ... + 673480.

It is an arithmetic number, because the mean of its divisors is an integer number (8403318).

Almost surely, 2^189208540 is an apocalyptic number.

189208540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189208540 is an abundant number, since it is smaller than the sum of its proper divisors (214150724).

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

189208540 is a wasteful number, since it uses less digits than its factorization.

189208540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 189208540 is about 13755.3095203271. The cubic root of 189208540 is about 574.0903474438.

The spelling of 189208540 in words is "one hundred eighty-nine million, two hundred eight thousand, five hundred forty".