256842906 has 16 divisors (see below), whose sum is σ = 514971648. Its totient is φ = 85400000.

The previous prime is 256842877. The next prime is 256842917. The reversal of 256842906 is 609248652.

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, 50970 + ... + 55781.

It is an arithmetic number, because the mean of its divisors is an integer number (32185728).

Almost surely, 2^256842906 is an apocalyptic number.

256842906 is an abundant number, since it is smaller than the sum of its proper divisors (258128742).

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

256842906 is a wasteful number, since it uses less digits than its factorization.

256842906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107157.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 256842906 is about 16026.3191656724. The cubic root of 256842906 is about 635.6565478802.

The spelling of 256842906 in words is "two hundred fifty-six million, eight hundred forty-two thousand, nine hundred six".