16839040 has 64 divisors (see below), whose sum is σ = 40869360. Its totient is φ = 6633472.

The previous prime is 16839037. The next prime is 16839049. The reversal of 16839040 is 4093861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 16838993 and 16839011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16839049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52962 + ... + 53278.

Almost surely, 2^16839040 is an apocalyptic number.

16839040 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 16839040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20434680).

16839040 is an abundant number, since it is smaller than the sum of its proper divisors (24030320).

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

16839040 is an equidigital number, since it uses as much as digits as its factorization.

16839040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16839040 is about 4103.5399352267. The cubic root of 16839040 is about 256.3140676608.

It can be divided in two parts, 16 and 839040, that added together give a square (839056 = 916²).

The spelling of 16839040 in words is "sixteen million, eight hundred thirty-nine thousand, forty".