256689622 has 8 divisors (see below), whose sum is σ = 440039376. Its totient is φ = 110009832.

The previous prime is 256689599. The next prime is 256689623. The reversal of 256689622 is 226986652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256689623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9167473 + ... + 9167500.

It is an arithmetic number, because the mean of its divisors is an integer number (55004922).

Almost surely, 2^256689622 is an apocalyptic number.

256689622 is a deficient number, since it is larger than the sum of its proper divisors (183349754).

256689622 is a wasteful number, since it uses less digits than its factorization.

256689622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18334982.

The product of its digits is 622080, while the sum is 46.

The square root of 256689622 is about 16021.5361935115. The cubic root of 256689622 is about 635.5300693133.

The spelling of 256689622 in words is "two hundred fifty-six million, six hundred eighty-nine thousand, six hundred twenty-two".