16530990 has 64 divisors (see below), whose sum is σ = 45674496. Its totient is φ = 3750912.

The previous prime is 16530989. The next prime is 16531037. The reversal of 16530990 is 9903561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46654 + ... + 47006.

It is an arithmetic number, because the mean of its divisors is an integer number (713664).

Almost surely, 2^16530990 is an apocalyptic number.

16530990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16530990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22837248).

16530990 is an abundant number, since it is smaller than the sum of its proper divisors (29143506).

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

16530990 is a wasteful number, since it uses less digits than its factorization.

16530990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 16530990 is about 4065.8320181729. The cubic root of 16530990 is about 254.7414526697.

The spelling of 16530990 in words is "sixteen million, five hundred thirty thousand, nine hundred ninety".