256822410 has 64 divisors (see below), whose sum is σ = 666989568. Its totient is φ = 62913024.

The previous prime is 256822403. The next prime is 256822427. The reversal of 256822410 is 14228652.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85494 + ... + 88446.

It is an arithmetic number, because the mean of its divisors is an integer number (10421712).

Almost surely, 2^256822410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256822410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333494784).

256822410 is an abundant number, since it is smaller than the sum of its proper divisors (410167158).

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

256822410 is a wasteful number, since it uses less digits than its factorization.

256822410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 256822410 is about 16025.6797047738. The cubic root of 256822410 is about 635.6396390190.

The spelling of 256822410 in words is "two hundred fifty-six million, eight hundred twenty-two thousand, four hundred ten".