256046445 has 24 divisors (see below), whose sum is σ = 452191896. Its totient is φ = 133980288.

The previous prime is 256046437. The next prime is 256046447. The reversal of 256046445 is 544640652.

256046445 is a `hidden beast` number, since 2 + 5 + 6 + 0 + 4 + 644 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 40220964 + 215825481 = 6342^2 + 14691^2 .

It is not a de Polignac number, because 256046445 - 2³ = 256046437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256046447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51294 + ... + 56063.

It is an arithmetic number, because the mean of its divisors is an integer number (18841329).

Almost surely, 2^256046445 is an apocalyptic number.

It is an amenable number.

256046445 is a deficient number, since it is larger than the sum of its proper divisors (196145451).

256046445 is a wasteful number, since it uses less digits than its factorization.

256046445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107421 (or 107418 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 256046445 is about 16001.4513404253. The cubic root of 256046445 is about 634.9988178621.

The spelling of 256046445 in words is "two hundred fifty-six million, forty-six thousand, four hundred forty-five".