16256840 has 32 divisors (see below), whose sum is σ = 36694080. Its totient is φ = 6482112.

The previous prime is 16256839. The next prime is 16256843. The reversal of 16256840 is 4865261.

It is a junction number, because it is equal to n+sod(n) for n = 16256797 and 16256806.

It is not an unprimeable number, because it can be changed into a prime (16256843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21509 + ... + 22251.

It is an arithmetic number, because the mean of its divisors is an integer number (1146690).

Almost surely, 2^16256840 is an apocalyptic number.

16256840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16256840 is an abundant number, since it is smaller than the sum of its proper divisors (20437240).

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

16256840 is a wasteful number, since it uses less digits than its factorization.

16256840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 16256840 is about 4031.9771824751. The cubic root of 16256840 is about 253.3253844844.

The spelling of 16256840 in words is "sixteen million, two hundred fifty-six thousand, eight hundred forty".