256035397 has 8 divisors (see below), whose sum is σ = 261021600. Its totient is φ = 251070864.

The previous prime is 256035371. The next prime is 256035401. The reversal of 256035397 is 793530652.

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

It is a cyclic number.

It is not a de Polignac number, because 256035397 - 2¹⁵ = 256002629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256035097) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19543 + ... + 29899.

It is an arithmetic number, because the mean of its divisors is an integer number (32627700).

Almost surely, 2^256035397 is an apocalyptic number.

It is an amenable number.

256035397 is a deficient number, since it is larger than the sum of its proper divisors (4986203).

256035397 is a wasteful number, since it uses less digits than its factorization.

256035397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10835.

The product of its (nonzero) digits is 170100, while the sum is 40.

The square root of 256035397 is about 16001.1061180157. The cubic root of 256035397 is about 634.9896846651.

The spelling of 256035397 in words is "two hundred fifty-six million, thirty-five thousand, three hundred ninety-seven".