16990500 has 96 divisors (see below), whose sum is σ = 50738688. Its totient is φ = 4416000.

The previous prime is 16990489. The next prime is 16990507. The reversal of 16990500 is 509961.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70380 + ... + 70620.

It is an arithmetic number, because the mean of its divisors is an integer number (528528).

Almost surely, 2^16990500 is an apocalyptic number.

16990500 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 16990500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25369344).

16990500 is an abundant number, since it is smaller than the sum of its proper divisors (33748188).

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

16990500 is a wasteful number, since it uses less digits than its factorization.

16990500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 16990500 is about 4121.9534204064. The cubic root of 16990500 is about 257.0802537194.

The spelling of 16990500 in words is "sixteen million, nine hundred ninety thousand, five hundred".