2806420 has 12 divisors (see below), whose sum is σ = 5893524. Its totient is φ = 1122560.

The previous prime is 2806387. The next prime is 2806439. The reversal of 2806420 is 246082.

It can be written as a sum of positive squares in 2 ways, for example, as 1547536 + 1258884 = 1244^2 + 1122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2806391 and 2806400.

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, 70141 + ... + 70180.

It is an arithmetic number, because the mean of its divisors is an integer number (491127).

2^2806420 is an apocalyptic number.

2806420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2806420 is an abundant number, since it is smaller than the sum of its proper divisors (3087104).

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

2806420 is a wasteful number, since it uses less digits than its factorization.

2806420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140330 (or 140328 counting only the distinct ones).

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

The square root of 2806420 is about 1675.2372966240. The cubic root of 2806420 is about 141.0536154098.

The spelling of 2806420 in words is "two million, eight hundred six thousand, four hundred twenty".