16788440 has 16 divisors (see below), whose sum is σ = 37774080. Its totient is φ = 6715360.

The previous prime is 16788437. The next prime is 16788451. The reversal of 16788440 is 4488761.

It is a junction number, because it is equal to n+sod(n) for n = 16788394 and 16788403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209816 + ... + 209895.

It is an arithmetic number, because the mean of its divisors is an integer number (2360880).

Almost surely, 2^16788440 is an apocalyptic number.

16788440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16788440 is an abundant number, since it is smaller than the sum of its proper divisors (20985640).

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

16788440 is a wasteful number, since it uses less digits than its factorization.

16788440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419722 (or 419718 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 16788440 is about 4097.3698881112. The cubic root of 16788440 is about 256.0570754902.

The spelling of 16788440 in words is "sixteen million, seven hundred eighty-eight thousand, four hundred forty".