8420908 has 12 divisors (see below), whose sum is σ = 15096312. Its totient is φ = 4107680.

The previous prime is 8420903. The next prime is 8420917. The reversal of 8420908 is 8090248.

It is a self number, because there is not a number n which added to its sum of digits gives 8420908.

It is not an unprimeable number, because it can be changed into a prime (8420903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25510 + ... + 25837.

It is an arithmetic number, because the mean of its divisors is an integer number (1258026).

Almost surely, 2^8420908 is an apocalyptic number.

It is an amenable number.

8420908 is a deficient number, since it is larger than the sum of its proper divisors (6675404).

8420908 is a wasteful number, since it uses less digits than its factorization.

8420908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51392 (or 51390 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 8420908 is about 2901.8800802239. The cubic root of 8420908 is about 203.4477888863.

The spelling of 8420908 in words is "eight million, four hundred twenty thousand, nine hundred eight".