8256420 has 36 divisors (see below), whose sum is σ = 25045020. Its totient is φ = 2201664.

The previous prime is 8256403. The next prime is 8256427. The reversal of 8256420 is 246528.

8256420 is a `hidden beast` number, since 82 + 564 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 3896676 = 2088^2 + 1974^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (8256427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22755 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (695695).

Almost surely, 2^8256420 is an apocalyptic number.

It is an amenable number.

8256420 is an abundant number, since it is smaller than the sum of its proper divisors (16788600).

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

8256420 is a wasteful number, since it uses less digits than its factorization.

8256420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45884 (or 45879 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 8256420 is about 2873.3986844850. The cubic root of 8256420 is about 202.1144010996.

The spelling of 8256420 in words is "eight million, two hundred fifty-six thousand, four hundred twenty".