2800040 has 16 divisors (see below), whose sum is σ = 6300180. Its totient is φ = 1120000.

The previous prime is 2800033. The next prime is 2800051. The reversal of 2800040 is 400082.

2800040 = T₄₇₁ + T₄₇₂ + ... + T₄₉₄.

2800040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2748964 + 51076 = 1658^2 + 226^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2799988 and 2800024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34961 + ... + 35040.

2^2800040 is an apocalyptic number.

2800040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2800040 is an abundant number, since it is smaller than the sum of its proper divisors (3500140).

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

2800040 is a wasteful number, since it uses less digits than its factorization.

2800040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70012 (or 70008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2800040 is about 1673.3320053116. The cubic root of 2800040 is about 140.9466458094.

The spelling of 2800040 in words is "two million, eight hundred thousand, forty".