16699904 has 60 divisors (see below), whose sum is σ = 36318546. Its totient is φ = 7667712.

The previous prime is 16699901. The next prime is 16700003. The reversal of 16699904 is 40999661.

It can be written as a sum of positive squares in 3 ways, for example, as 6150400 + 10549504 = 2480^2 + 3248^2 .

It is a nialpdrome in base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16699901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86432 + ... + 86624.

Almost surely, 2^16699904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16699904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18159273).

16699904 is an abundant number, since it is smaller than the sum of its proper divisors (19618642).

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

16699904 is an equidigital number, since it uses as much as digits as its factorization.

16699904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 16699904 is about 4086.5516025128. The cubic root of 16699904 is about 255.6061652620.

The spelling of 16699904 in words is "sixteen million, six hundred ninety-nine thousand, nine hundred four".