84200420 has 12 divisors (see below), whose sum is σ = 176820924. Its totient is φ = 33680160.

The previous prime is 84200399. The next prime is 84200477. The reversal of 84200420 is 2400248.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 53553124 = 5536^2 + 7318^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 4210021 = 84200420 / (8 + 4 + 2 + 0 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 84200392 and 84200401.

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, 2104991 + ... + 2105030.

It is an arithmetic number, because the mean of its divisors is an integer number (14735077).

Almost surely, 2^84200420 is an apocalyptic number.

It is an amenable number.

84200420 is an abundant number, since it is smaller than the sum of its proper divisors (92620504).

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

84200420 is a wasteful number, since it uses less digits than its factorization.

84200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210030 (or 4210028 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 84200420 is about 9176.0786831849. The cubic root of 84200420 is about 438.2999481417.

Adding to 84200420 its reverse (2400248), we get a palindrome (86600668).

The spelling of 84200420 in words is "eighty-four million, two hundred thousand, four hundred twenty".