42806020 has 12 divisors (see below), whose sum is σ = 89892684. Its totient is φ = 17122400.

The previous prime is 42805999. The next prime is 42806041. The reversal of 42806020 is 2060824.

It is an interprime number because it is at equal distance from previous prime (42805999) and next prime (42806041).

It can be written as a sum of positive squares in 2 ways, for example, as 9351364 + 33454656 = 3058^2 + 5784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42805982 and 42806000.

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, 1070131 + ... + 1070170.

It is an arithmetic number, because the mean of its divisors is an integer number (7491057).

Almost surely, 2^42806020 is an apocalyptic number.

It is an amenable number.

42806020 is an abundant number, since it is smaller than the sum of its proper divisors (47086664).

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

42806020 is a wasteful number, since it uses less digits than its factorization.

42806020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140310 (or 2140308 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 42806020 is about 6542.6309692661. The cubic root of 42806020 is about 349.8121985681.

Adding to 42806020 its reverse (2060824), we get a palindrome (44866844).

The spelling of 42806020 in words is "forty-two million, eight hundred six thousand, twenty".