256400606 has 32 divisors (see below), whose sum is σ = 480591360. Its totient is φ = 99669600.

The previous prime is 256400587. The next prime is 256400609. The reversal of 256400606 is 606004652.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256400609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76751 + ... + 80021.

It is an arithmetic number, because the mean of its divisors is an integer number (15018480).

Almost surely, 2^256400606 is an apocalyptic number.

256400606 is a deficient number, since it is larger than the sum of its proper divisors (224190754).

256400606 is a wasteful number, since it uses less digits than its factorization.

256400606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800.

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

The square root of 256400606 is about 16012.5140437097. The cubic root of 256400606 is about 635.2914577469.

The spelling of 256400606 in words is "two hundred fifty-six million, four hundred thousand, six hundred six".