18890746 has 8 divisors (see below), whose sum is σ = 32384160. Its totient is φ = 8096028.

The previous prime is 18890741. The next prime is 18890747. The reversal of 18890746 is 64709881.

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

It is a super-4 number, since 4×18890746⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not an unprimeable number, because it can be changed into a prime (18890741) 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, 674656 + ... + 674683.

It is an arithmetic number, because the mean of its divisors is an integer number (4048020).

Almost surely, 2^18890746 is an apocalyptic number.

18890746 is a deficient number, since it is larger than the sum of its proper divisors (13493414).

18890746 is a wasteful number, since it uses less digits than its factorization.

18890746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349348.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18890746 is about 4346.3485824310. The cubic root of 18890746 is about 266.3277190146.

The spelling of 18890746 in words is "eighteen million, eight hundred ninety thousand, seven hundred forty-six".