189819648 has 54 divisors (see below), whose sum is σ = 547303484. Its totient is φ = 63272448.

The previous prime is 189819647. The next prime is 189819653. The reversal of 189819648 is 846918981.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 189819594 and 189819603.

It is not an unprimeable number, because it can be changed into a prime (189819647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38890 + ... + 43497.

Almost surely, 2^189819648 is an apocalyptic number.

189819648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189819648 is an abundant number, since it is smaller than the sum of its proper divisors (357483836).

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

189819648 is an equidigital number, since it uses as much as digits as its factorization.

189819648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82409 (or 82392 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 189819648 is about 13777.5051442560. The cubic root of 189819648 is about 574.7077511721.

The spelling of 189819648 in words is "one hundred eighty-nine million, eight hundred nineteen thousand, six hundred forty-eight".