256406006 has 4 divisors (see below), whose sum is σ = 384609012. Its totient is φ = 128203002.

The previous prime is 256405999. The next prime is 256406011. The reversal of 256406006 is 600604652.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 256406006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64101500 + ... + 64101503.

It is an arithmetic number, because the mean of its divisors is an integer number (96152253).

Almost surely, 2^256406006 is an apocalyptic number.

256406006 is a deficient number, since it is larger than the sum of its proper divisors (128203006).

256406006 is a wasteful number, since it uses less digits than its factorization.

256406006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128203005.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 256406006 is about 16012.6826609410. The cubic root of 256406006 is about 635.2959176295.

The spelling of 256406006 in words is "two hundred fifty-six million, four hundred six thousand, six".