256402446 has 16 divisors (see below), whose sum is σ = 522481104. Its totient is φ = 83854784.

The previous prime is 256402403. The next prime is 256402453. The reversal of 256402446 is 644204652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402831 + ... + 403466.

It is an arithmetic number, because the mean of its divisors is an integer number (32655069).

Almost surely, 2^256402446 is an apocalyptic number.

256402446 is an abundant number, since it is smaller than the sum of its proper divisors (266078658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256402446 is a wasteful number, since it uses less digits than its factorization.

256402446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806355.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 256402446 is about 16012.5714986694. The cubic root of 256402446 is about 635.2929774177.

The spelling of 256402446 in words is "two hundred fifty-six million, four hundred two thousand, four hundred forty-six".