189918446 has 8 divisors (see below), whose sum is σ = 290939040. Its totient is φ = 92938768.

The previous prime is 189918389. The next prime is 189918457. The reversal of 189918446 is 644819981.

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

It is a super-2 number, since 2×189918446² = 72138032262109832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189918394 and 189918403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010111 + ... + 1010298.

It is an arithmetic number, because the mean of its divisors is an integer number (36367380).

Almost surely, 2^189918446 is an apocalyptic number.

189918446 is a deficient number, since it is larger than the sum of its proper divisors (101020594).

189918446 is a wasteful number, since it uses less digits than its factorization.

189918446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020458.

The product of its digits is 497664, while the sum is 50.

The square root of 189918446 is about 13781.0901600708. The cubic root of 189918446 is about 574.8074425174.

The spelling of 189918446 in words is "one hundred eighty-nine million, nine hundred eighteen thousand, four hundred forty-six".