8420706 has 32 divisors (see below), whose sum is σ = 21386880. Its totient is φ = 2405808.

The previous prime is 8420681. The next prime is 8420749. The reversal of 8420706 is 6070248.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 8420706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10761 + ... + 11516.

It is an arithmetic number, because the mean of its divisors is an integer number (668340).

Almost surely, 2^8420706 is an apocalyptic number.

8420706 is an abundant number, since it is smaller than the sum of its proper divisors (12966174).

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

8420706 is a wasteful number, since it uses less digits than its factorization.

8420706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22295 (or 22289 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 8420706 is about 2901.8452749931. The cubic root of 8420706 is about 203.4461621107.

The spelling of 8420706 in words is "eight million, four hundred twenty thousand, seven hundred six".