16890530 has 8 divisors (see below), whose sum is σ = 30402972. Its totient is φ = 6756208.

The previous prime is 16890527. The next prime is 16890539. The reversal of 16890530 is 3509861.

It can be written as a sum of positive squares in 2 ways, for example, as 15547249 + 1343281 = 3943^2 + 1159^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16890539) 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, 844517 + ... + 844536.

Almost surely, 2^16890530 is an apocalyptic number.

16890530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16890530 is a deficient number, since it is larger than the sum of its proper divisors (13512442).

16890530 is a wasteful number, since it uses less digits than its factorization.

16890530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689060.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 16890530 is about 4109.8089979949. The cubic root of 16890530 is about 256.5750521028.

The spelling of 16890530 in words is "sixteen million, eight hundred ninety thousand, five hundred thirty".