16783840 has 48 divisors (see below), whose sum is σ = 41746320. Its totient is φ = 6359040.

The previous prime is 16783831. The next prime is 16783861. The reversal of 16783840 is 4838761.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16783840.

It is a congruent number.

It is an unprimeable number.

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, 280 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (869715).

Almost surely, 2^16783840 is an apocalyptic number.

16783840 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 16783840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20873160).

16783840 is an abundant number, since it is smaller than the sum of its proper divisors (24962480).

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

16783840 is a wasteful number, since it uses less digits than its factorization.

16783840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555 (or 5547 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 16783840 is about 4096.8085139533. The cubic root of 16783840 is about 256.0336869732.

The spelling of 16783840 in words is "sixteen million, seven hundred eighty-three thousand, eight hundred forty".