256334430 has 64 divisors (see below), whose sum is σ = 674707968. Its totient is φ = 61810560.

The previous prime is 256334423. The next prime is 256334467. The reversal of 256334430 is 34433652.

256334430 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63039 + ... + 66981.

It is an arithmetic number, because the mean of its divisors is an integer number (10542312).

Almost surely, 2^256334430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256334430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337353984).

256334430 is an abundant number, since it is smaller than the sum of its proper divisors (418373538).

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

256334430 is a wasteful number, since it uses less digits than its factorization.

256334430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161.

The product of its (nonzero) digits is 25920, while the sum is 30.

The square root of 256334430 is about 16010.4475265372. The cubic root of 256334430 is about 635.2367976253.

The spelling of 256334430 in words is "two hundred fifty-six million, three hundred thirty-four thousand, four hundred thirty".