189820540 has 48 divisors (see below), whose sum is σ = 490617792. Its totient is φ = 60074496.

The previous prime is 189820537. The next prime is 189820549. The reversal of 189820540 is 45028981.

It is a self number, because there is not a number n which added to its sum of digits gives 189820540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189820549) 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, 50329 + ... + 53968.

It is an arithmetic number, because the mean of its divisors is an integer number (10221204).

Almost surely, 2^189820540 is an apocalyptic number.

189820540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189820540 is an abundant number, since it is smaller than the sum of its proper divisors (300797252).

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

189820540 is a wasteful number, since it uses less digits than its factorization.

189820540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104326 (or 104324 counting only the distinct ones).

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

The square root of 189820540 is about 13777.5375158263. The cubic root of 189820540 is about 574.7086513924.

The spelling of 189820540 in words is "one hundred eighty-nine million, eight hundred twenty thousand, five hundred forty".