189911540 has 48 divisors (see below), whose sum is σ = 490852992. Its totient is φ = 60103296.

The previous prime is 189911531. The next prime is 189911563. The reversal of 189911540 is 45119981.

It is a junction number, because it is equal to n+sod(n) for n = 189911494 and 189911503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50354 + ... + 53993.

It is an arithmetic number, because the mean of its divisors is an integer number (10226104).

Almost surely, 2^189911540 is an apocalyptic number.

189911540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189911540 is an abundant number, since it is smaller than the sum of its proper divisors (300941452).

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

189911540 is a wasteful number, since it uses less digits than its factorization.

189911540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104376 (or 104374 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 189911540 is about 13780.8395970637. The cubic root of 189911540 is about 574.8004751964.

The spelling of 189911540 in words is "one hundred eighty-nine million, nine hundred eleven thousand, five hundred forty".