8428820 has 24 divisors (see below), whose sum is σ = 17824128. Its totient is φ = 3348000.

The previous prime is 8428811. The next prime is 8428867. The reversal of 8428820 is 288248.

It is a congruent number.

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, 1625 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (742672).

Almost surely, 2^8428820 is an apocalyptic number.

It is an amenable number.

8428820 is an abundant number, since it is smaller than the sum of its proper divisors (9395308).

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

8428820 is a wasteful number, since it uses less digits than its factorization.

8428820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 8428820 is about 2903.2430142859. The cubic root of 8428820 is about 203.5114864921.

The spelling of 8428820 in words is "eight million, four hundred twenty-eight thousand, eight hundred twenty".