6420828 has 24 divisors (see below), whose sum is σ = 15023232. Its totient is φ = 2134384.

The previous prime is 6420823. The next prime is 6420833. The reversal of 6420828 is 8280246.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6420823) and next prime (6420833).

It is a junction number, because it is equal to n+sod(n) for n = 6420795 and 6420804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420823) 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, 7351 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (625968).

Almost surely, 2^6420828 is an apocalyptic number.

It is an amenable number.

6420828 is an abundant number, since it is smaller than the sum of its proper divisors (8602404).

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

6420828 is a wasteful number, since it uses less digits than its factorization.

6420828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 6420828 is about 2533.9352793629. The cubic root of 6420828 is about 185.8647415303.

The spelling of 6420828 in words is "six million, four hundred twenty thousand, eight hundred twenty-eight".