189619540 has 24 divisors (see below), whose sum is σ = 434401632. Its totient is φ = 68952480.

The previous prime is 189619517. The next prime is 189619543. The reversal of 189619540 is 45916981.

189619540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189619543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430734 + ... + 431173.

It is an arithmetic number, because the mean of its divisors is an integer number (18100068).

Almost surely, 2^189619540 is an apocalyptic number.

189619540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189619540 is an abundant number, since it is smaller than the sum of its proper divisors (244782092).

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

189619540 is a wasteful number, since it uses less digits than its factorization.

189619540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861927 (or 861925 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 189619540 is about 13770.2411017382. The cubic root of 189619540 is about 574.5057277323.

The spelling of 189619540 in words is "one hundred eighty-nine million, six hundred nineteen thousand, five hundred forty".