427820 has 12 divisors (see below), whose sum is σ = 898464. Its totient is φ = 171120.

The previous prime is 427813. The next prime is 427849. The reversal of 427820 is 28724.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 427820.

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, 10676 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (74872).

2⁴²⁷⁸²⁰ is an apocalyptic number.

It is an amenable number.

427820 is an abundant number, since it is smaller than the sum of its proper divisors (470644).

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

427820 is a wasteful number, since it uses less digits than its factorization.

427820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21400 (or 21398 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 427820 is about 654.0795058707. The cubic root of 427820 is about 75.3506542955.

The spelling of 427820 in words is "four hundred twenty-seven thousand, eight hundred twenty".