16739440 has 40 divisors (see below), whose sum is σ = 39403728. Its totient is φ = 6612480.

The previous prime is 16739417. The next prime is 16739447. The reversal of 16739440 is 4493761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) 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 = 16739396 and 16739405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16739447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380 + ... + 7900.

Almost surely, 2^16739440 is an apocalyptic number.

16739440 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 16739440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19701864).

16739440 is an abundant number, since it is smaller than the sum of its proper divisors (22664288).

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

16739440 is a wasteful number, since it uses less digits than its factorization.

16739440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617 (or 2611 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 16739440 is about 4091.3860732031. The cubic root of 16739440 is about 255.8077169394.

The spelling of 16739440 in words is "sixteen million, seven hundred thirty-nine thousand, four hundred forty".