420828 has 12 divisors (see below), whose sum is σ = 981960. Its totient is φ = 140272.

The previous prime is 420811. The next prime is 420851. The reversal of 420828 is 828024.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 420798 and 420807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17523 + ... + 17546.

It is an arithmetic number, because the mean of its divisors is an integer number (81830).

2⁴²⁰⁸²⁸ is an apocalyptic number.

It is an amenable number.

420828 is an abundant number, since it is smaller than the sum of its proper divisors (561132).

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

420828 is a wasteful number, since it uses less digits than its factorization.

420828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35076 (or 35074 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 420828 is about 648.7125711746. The cubic root of 420828 is about 74.9379041578.

The spelling of 420828 in words is "four hundred twenty thousand, eight hundred twenty-eight".