256022430 has 64 divisors (see below), whose sum is σ = 656156160. Its totient is φ = 63778176.

The previous prime is 256022423. The next prime is 256022441. The reversal of 256022430 is 34220652.

It is a self number, because there is not a number n which added to its sum of digits gives 256022430.

It is a congruent 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, 25356 + ... + 33984.

It is an arithmetic number, because the mean of its divisors is an integer number (10252440).

Almost surely, 2^256022430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256022430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328078080).

256022430 is an abundant number, since it is smaller than the sum of its proper divisors (400133730).

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

256022430 is a wasteful number, since it uses less digits than its factorization.

256022430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 256022430 is about 16000.7009221471. The cubic root of 256022430 is about 634.9789647278.

The spelling of 256022430 in words is "two hundred fifty-six million, twenty-two thousand, four hundred thirty".