8420860 has 24 divisors (see below), whose sum is σ = 20210400. Its totient is φ = 2887104.

The previous prime is 8420843. The next prime is 8420869. The reversal of 8420860 is 680248.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29935 + ... + 30214.

It is an arithmetic number, because the mean of its divisors is an integer number (842100).

Almost surely, 2^8420860 is an apocalyptic number.

It is an amenable number.

8420860 is an abundant number, since it is smaller than the sum of its proper divisors (11789540).

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

8420860 is a wasteful number, since it uses less digits than its factorization.

8420860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60165 (or 60163 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 8420860 is about 2901.8718097118. The cubic root of 8420860 is about 203.4474023281.

The spelling of 8420860 in words is "eight million, four hundred twenty thousand, eight hundred sixty".