8420386 has 16 divisors (see below), whose sum is σ = 13971384. Its totient is φ = 3780864.

The previous prime is 8420351. The next prime is 8420393. The reversal of 8420386 is 6830248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8231161 + 189225 = 2869^2 + 435^2 .

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, 3415 + ... + 5338.

Almost surely, 2^8420386 is an apocalyptic number.

8420386 is a deficient number, since it is larger than the sum of its proper divisors (5550998).

8420386 is a wasteful number, since it uses less digits than its factorization.

8420386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8805.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 8420386 is about 2901.7901371395. The cubic root of 8420386 is about 203.4435849873.

The spelling of 8420386 in words is "eight million, four hundred twenty thousand, three hundred eighty-six".