16981344 has 36 divisors (see below), whose sum is σ = 48291516. Its totient is φ = 5660352.

The previous prime is 16981343. The next prime is 16981357. The reversal of 16981344 is 44318961.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16981299 and 16981308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16981343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29194 + ... + 29769.

It is an arithmetic number, because the mean of its divisors is an integer number (1341431).

Almost surely, 2^16981344 is an apocalyptic number.

It is an amenable number.

16981344 is an abundant number, since it is smaller than the sum of its proper divisors (31310172).

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

16981344 is a wasteful number, since it uses less digits than its factorization.

16981344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58979 (or 58968 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16981344 is about 4120.8426322780. The cubic root of 16981344 is about 257.0340661489.

The spelling of 16981344 in words is "sixteen million, nine hundred eighty-one thousand, three hundred forty-four".