16993944 has 96 divisors (see below), whose sum is σ = 51480000. Its totient is φ = 5019840.

The previous prime is 16993943. The next prime is 16993969. The reversal of 16993944 is 44939961.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16993944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16993943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33807 + ... + 34305.

It is an arithmetic number, because the mean of its divisors is an integer number (536250).

Almost surely, 2^16993944 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 16993944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25740000).

16993944 is an abundant number, since it is smaller than the sum of its proper divisors (34486056).

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

16993944 is a wasteful number, since it uses less digits than its factorization.

16993944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 558 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 16993944 is about 4122.3711623288. The cubic root of 16993944 is about 257.0976227310.

The spelling of 16993944 in words is "sixteen million, nine hundred ninety-three thousand, nine hundred forty-four".