256722044 has 24 divisors (see below), whose sum is σ = 469929600. Its totient is φ = 122483504.

The previous prime is 256722031. The next prime is 256722073. The reversal of 256722044 is 440227652.

It is a self number, because there is not a number n which added to its sum of digits gives 256722044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37607 + ... + 43905.

It is an arithmetic number, because the mean of its divisors is an integer number (19580400).

Almost surely, 2^256722044 is an apocalyptic number.

It is an amenable number.

256722044 is a deficient number, since it is larger than the sum of its proper divisors (213207556).

256722044 is a wasteful number, since it uses less digits than its factorization.

256722044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769 (or 6767 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 256722044 is about 16022.5479871336. The cubic root of 256722044 is about 635.5568257365.

Adding to 256722044 its reverse (440227652), we get a palindrome (696949696).

The spelling of 256722044 in words is "two hundred fifty-six million, seven hundred twenty-two thousand, forty-four".