256787106 has 8 divisors (see below), whose sum is σ = 513574224. Its totient is φ = 85595700.

The previous prime is 256787093. The next prime is 256787149. The reversal of 256787106 is 601787652.

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

256787106 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21398920 + ... + 21398931.

It is an arithmetic number, because the mean of its divisors is an integer number (64196778).

Almost surely, 2^256787106 is an apocalyptic number.

256787106 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.

256787106 is a wasteful number, since it uses less digits than its factorization.

256787106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42797856.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 256787106 is about 16024.5781847760. The cubic root of 256787106 is about 635.6105116930.

The spelling of 256787106 in words is "two hundred fifty-six million, seven hundred eighty-seven thousand, one hundred six".