16890026 has 4 divisors (see below), whose sum is σ = 25335042. Its totient is φ = 8445012.

The previous prime is 16890023. The next prime is 16890037. The reversal of 16890026 is 62009861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 7557001 = 3055^2 + 2749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16889974 and 16890001.

It is not an unprimeable number, because it can be changed into a prime (16890023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4222505 + ... + 4222508.

Almost surely, 2^16890026 is an apocalyptic number.

16890026 is a deficient number, since it is larger than the sum of its proper divisors (8445016).

16890026 is an equidigital number, since it uses as much as digits as its factorization.

16890026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8445015.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 16890026 is about 4109.7476808193. The cubic root of 16890026 is about 256.5725000788.

Adding to 16890026 its reverse (62009861), we get a palindrome (78899887).

The spelling of 16890026 in words is "sixteen million, eight hundred ninety thousand, twenty-six".