189355540 has 48 divisors (see below), whose sum is σ = 435020544. Its totient is φ = 68662400.

The previous prime is 189355511. The next prime is 189355541. The reversal of 189355540 is 45553981.

It is a junction number, because it is equal to n+sod(n) for n = 189355493 and 189355502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189355541) 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, 93822 + ... + 95818.

It is an arithmetic number, because the mean of its divisors is an integer number (9062928).

Almost surely, 2^189355540 is an apocalyptic number.

189355540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189355540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217510272).

189355540 is an abundant number, since it is smaller than the sum of its proper divisors (245665004).

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

189355540 is a wasteful number, since it uses less digits than its factorization.

189355540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 189355540 is about 13760.6518740938. The cubic root of 189355540 is about 574.2389831509.

The spelling of 189355540 in words is "one hundred eighty-nine million, three hundred fifty-five thousand, five hundred forty".