2812840 has 16 divisors (see below), whose sum is σ = 6328980. Its totient is φ = 1125120.

The previous prime is 2812829. The next prime is 2812853. The reversal of 2812840 is 482182.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 142884 = 1634^2 + 378^2 .

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, 35121 + ... + 35200.

2^2812840 is an apocalyptic number.

2812840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2812840 is an abundant number, since it is smaller than the sum of its proper divisors (3516140).

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

2812840 is a wasteful number, since it uses less digits than its factorization.

2812840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70332 (or 70328 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 2812840 is about 1677.1523484764. The cubic root of 2812840 is about 141.1610921430.

The spelling of 2812840 in words is "two million, eight hundred twelve thousand, eight hundred forty".