8420920 has 16 divisors (see below), whose sum is σ = 18947160. Its totient is φ = 3368352.

The previous prime is 8420917. The next prime is 8420927. The reversal of 8420920 is 290248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420927) 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, 105222 + ... + 105301.

Almost surely, 2^8420920 is an apocalyptic number.

It is an amenable number.

8420920 is an abundant number, since it is smaller than the sum of its proper divisors (10526240).

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

8420920 is a wasteful number, since it uses less digits than its factorization.

8420920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210534 (or 210530 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 8420920 is about 2901.8821478482. The cubic root of 8420920 is about 203.4478855256.

The spelling of 8420920 in words is "eight million, four hundred twenty thousand, nine hundred twenty".