189481478 has 16 divisors (see below), whose sum is σ = 293669376. Its totient is φ = 91634760.

The previous prime is 189481441. The next prime is 189481529. The reversal of 189481478 is 874184981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838 + ... + 19553.

It is an arithmetic number, because the mean of its divisors is an integer number (18354336).

Almost surely, 2^189481478 is an apocalyptic number.

189481478 is a deficient number, since it is larger than the sum of its proper divisors (104187898).

189481478 is a wasteful number, since it uses less digits than its factorization.

189481478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21539.

The product of its digits is 516096, while the sum is 50.

The square root of 189481478 is about 13765.2271321617. The cubic root of 189481478 is about 574.3662613252.

The spelling of 189481478 in words is "one hundred eighty-nine million, four hundred eighty-one thousand, four hundred seventy-eight".