189481904 has 20 divisors (see below), whose sum is σ = 367338840. Its totient is φ = 94684800.

The previous prime is 189481861. The next prime is 189481907. The reversal of 189481904 is 409184981.

It is not an unprimeable number, because it can be changed into a prime (189481907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43004 + ... + 47204.

It is an arithmetic number, because the mean of its divisors is an integer number (18366942).

Almost surely, 2^189481904 is an apocalyptic number.

It is an amenable number.

189481904 is a deficient number, since it is larger than the sum of its proper divisors (177856936).

189481904 is a wasteful number, since it uses less digits than its factorization.

189481904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028 (or 7022 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 189481904 is about 13765.2426059260. The cubic root of 189481904 is about 574.3666917627.

The spelling of 189481904 in words is "one hundred eighty-nine million, four hundred eighty-one thousand, nine hundred four".