189678554 has 16 divisors (see below), whose sum is σ = 324428328. Its totient is φ = 82394112.

The previous prime is 189678551. The next prime is 189678563. The reversal of 189678554 is 455876981.

189678554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 170955625 + 18722929 = 13075^2 + 4327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189678496 and 189678505.

It is not an unprimeable number, because it can be changed into a prime (189678551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214127 + ... + 215010.

Almost surely, 2^189678554 is an apocalyptic number.

189678554 is a deficient number, since it is larger than the sum of its proper divisors (134749774).

189678554 is a wasteful number, since it uses less digits than its factorization.

189678554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429169.

The product of its digits is 2419200, while the sum is 53.

The square root of 189678554 is about 13772.3837442906. The cubic root of 189678554 is about 574.5653213874.

The spelling of 189678554 in words is "one hundred eighty-nine million, six hundred seventy-eight thousand, five hundred fifty-four".