16638030 has 48 divisors (see below), whose sum is σ = 43505280. Its totient is φ = 4411584.

The previous prime is 16638023. The next prime is 16638077. The reversal of 16638030 is 3083661.

It is a junction number, because it is equal to n+sod(n) for n = 16637985 and 16638003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19656 + ... + 20484.

It is an arithmetic number, because the mean of its divisors is an integer number (906360).

Almost surely, 2^16638030 is an apocalyptic number.

16638030 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 16638030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21752640).

16638030 is an abundant number, since it is smaller than the sum of its proper divisors (26867250).

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

16638030 is a wasteful number, since it uses less digits than its factorization.

16638030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16638030 is about 4078.9741357356. The cubic root of 16638030 is about 255.2900966101.

The spelling of 16638030 in words is "sixteen million, six hundred thirty-eight thousand, thirty".