8256645 has 48 divisors (see below), whose sum is σ = 15567552. Its totient is φ = 4032000.

The previous prime is 8256643. The next prime is 8256653. The reversal of 8256645 is 5466528.

8256645 is a `hidden beast` number, since 8 + 2 + 5 + 6 + 645 = 666.

It is not a de Polignac number, because 8256645 - 2¹ = 8256643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32770 + ... + 33020.

It is an arithmetic number, because the mean of its divisors is an integer number (324324).

Almost surely, 2^8256645 is an apocalyptic number.

8256645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8256645 is a deficient number, since it is larger than the sum of its proper divisors (7310907).

8256645 is a wasteful number, since it uses less digits than its factorization.

8256645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 8256645 is about 2873.4378364600. The cubic root of 8256645 is about 202.1162370579.

The spelling of 8256645 in words is "eight million, two hundred fifty-six thousand, six hundred forty-five".