18890046 has 24 divisors (see below), whose sum is σ = 46775664. Its totient is φ = 5397120.

The previous prime is 18890033. The next prime is 18890057. The reversal of 18890046 is 64009881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74835 + ... + 75086.

It is an arithmetic number, because the mean of its divisors is an integer number (1948986).

Almost surely, 2^18890046 is an apocalyptic number.

18890046 is an abundant number, since it is smaller than the sum of its proper divisors (27885618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18890046 is a wasteful number, since it uses less digits than its factorization.

18890046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149936 (or 149933 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18890046 is about 4346.2680543197. The cubic root of 18890046 is about 266.3244293668.

The spelling of 18890046 in words is "eighteen million, eight hundred ninety thousand, forty-six".