256488558 has 8 divisors (see below), whose sum is σ = 512977128. Its totient is φ = 85496184.

The previous prime is 256488527. The next prime is 256488559. The reversal of 256488558 is 855884652.

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

256488558 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 256488558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256488559) 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, 21374041 + ... + 21374052.

It is an arithmetic number, because the mean of its divisors is an integer number (64122141).

Almost surely, 2^256488558 is an apocalyptic number.

256488558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256488558 is a wasteful number, since it uses less digits than its factorization.

256488558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42748098.

The product of its digits is 3072000, while the sum is 51.

The square root of 256488558 is about 16015.2601602347. The cubic root of 256488558 is about 635.3640898772.

The spelling of 256488558 in words is "two hundred fifty-six million, four hundred eighty-eight thousand, five hundred fifty-eight".