18890446 has 8 divisors (see below), whose sum is σ = 29827080. Its totient is φ = 8948088.

The previous prime is 18890441. The next prime is 18890467. The reversal of 18890446 is 64409881.

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

It is a junction number, because it is equal to n+sod(n) for n = 18890399 and 18890408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248521 + ... + 248596.

It is an arithmetic number, because the mean of its divisors is an integer number (3728385).

Almost surely, 2^18890446 is an apocalyptic number.

18890446 is a deficient number, since it is larger than the sum of its proper divisors (10936634).

18890446 is a wasteful number, since it uses less digits than its factorization.

18890446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497138.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 18890446 is about 4346.3140705660. The cubic root of 18890446 is about 266.3263091755.

The spelling of 18890446 in words is "eighteen million, eight hundred ninety thousand, four hundred forty-six".