16138500 has 192 divisors, whose sum is σ = 56609280. Its totient is φ = 3494400.

The previous prime is 16138481. The next prime is 16138511. The reversal of 16138500 is 583161.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304474 + ... + 304526.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^16138500 is an apocalyptic number.

16138500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16138500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28304640).

16138500 is an abundant number, since it is smaller than the sum of its proper divisors (40470780).

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

16138500 is a wasteful number, since it uses less digits than its factorization.

16138500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16138500 is about 4017.2751959506. The cubic root of 16138500 is about 252.7092015222.

The spelling of 16138500 in words is "sixteen million, one hundred thirty-eight thousand, five hundred".