256402486 has 8 divisors (see below), whose sum is σ = 384673464. Its totient is φ = 128178000.

The previous prime is 256402481. The next prime is 256402529. The reversal of 256402486 is 684204652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256402481) 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 3 ways as a sum of consecutive naturals, for example, 10881 + ... + 25123.

It is an arithmetic number, because the mean of its divisors is an integer number (48084183).

Almost surely, 2^256402486 is an apocalyptic number.

256402486 is a deficient number, since it is larger than the sum of its proper divisors (128270978).

256402486 is a wasteful number, since it uses less digits than its factorization.

256402486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23246.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 256402486 is about 16012.5727476880. The cubic root of 256402486 is about 635.2930104539.

The spelling of 256402486 in words is "two hundred fifty-six million, four hundred two thousand, four hundred eighty-six".