189673478 has 8 divisors (see below), whose sum is σ = 284579568. Its totient is φ = 94813624.

The previous prime is 189673439. The next prime is 189673489. The reversal of 189673478 is 874376981.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1775 + ... + 19557.

It is an arithmetic number, because the mean of its divisors is an integer number (35572446).

Almost surely, 2^189673478 is an apocalyptic number.

189673478 is a deficient number, since it is larger than the sum of its proper divisors (94906090).

189673478 is a wasteful number, since it uses less digits than its factorization.

189673478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23118.

The product of its digits is 2032128, while the sum is 53.

The square root of 189673478 is about 13772.1994612335. The cubic root of 189673478 is about 574.5601960152.

The spelling of 189673478 in words is "one hundred eighty-nine million, six hundred seventy-three thousand, four hundred seventy-eight".