256366416 has 80 divisors (see below), whose sum is σ = 675581760. Its totient is φ = 83758080.

The previous prime is 256366403. The next prime is 256366423. The reversal of 256366416 is 614663652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912196 + ... + 912476.

It is an arithmetic number, because the mean of its divisors is an integer number (8444772).

Almost surely, 2^256366416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256366416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337790880).

256366416 is an abundant number, since it is smaller than the sum of its proper divisors (419215344).

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

256366416 is a wasteful number, since it uses less digits than its factorization.

256366416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 598 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 256366416 is about 16011.4464056187. The cubic root of 256366416 is about 635.2632186295.

The spelling of 256366416 in words is "two hundred fifty-six million, three hundred sixty-six thousand, four hundred sixteen".