189909648 has 60 divisors (see below), whose sum is σ = 532675728. Its totient is φ = 63161280.

The previous prime is 189909647. The next prime is 189909667. The reversal of 189909648 is 846909981.

It is a junction number, because it is equal to n+sod(n) for n = 189909594 and 189909603.

It is not an unprimeable number, because it can be changed into a prime (189909647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77563 + ... + 79973.

Almost surely, 2^189909648 is an apocalyptic number.

189909648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189909648 is an abundant number, since it is smaller than the sum of its proper divisors (342766080).

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

189909648 is a wasteful number, since it uses less digits than its factorization.

189909648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 189909648 is about 13780.7709508576. The cubic root of 189909648 is about 574.7985663672.

The spelling of 189909648 in words is "one hundred eighty-nine million, nine hundred nine thousand, six hundred forty-eight".