256908446 has 8 divisors (see below), whose sum is σ = 385526280. Its totient is φ = 128399688.

The previous prime is 256908433. The next prime is 256908493. The reversal of 256908446 is 644809652.

256908446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×256908446² = 132003899252269832, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256908397 and 256908406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21101 + ... + 30968.

It is an arithmetic number, because the mean of its divisors is an integer number (48190785).

Almost surely, 2^256908446 is an apocalyptic number.

256908446 is a deficient number, since it is larger than the sum of its proper divisors (128617834).

256908446 is a wasteful number, since it uses less digits than its factorization.

256908446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54538.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 256908446 is about 16028.3637967199. The cubic root of 256908446 is about 635.7106112604.

The spelling of 256908446 in words is "two hundred fifty-six million, nine hundred eight thousand, four hundred forty-six".