16919644 has 48 divisors (see below), whose sum is σ = 35642880. Its totient is φ = 6874560.

The previous prime is 16919629. The next prime is 16919647. The reversal of 16919644 is 44691961.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16919597 and 16919606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16919647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54249 + ... + 54559.

It is an arithmetic number, because the mean of its divisors is an integer number (742560).

Almost surely, 2^16919644 is an apocalyptic number.

16919644 is a gapful number since it is divisible by the number (14) 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 16919644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17821440).

16919644 is an abundant number, since it is smaller than the sum of its proper divisors (18723236).

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

16919644 is a wasteful number, since it uses less digits than its factorization.

16919644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 416 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 16919644 is about 4113.3494867322. The cubic root of 16919644 is about 256.7223859092.

The spelling of 16919644 in words is "sixteen million, nine hundred nineteen thousand, six hundred forty-four".