2782870 has 32 divisors (see below), whose sum is σ = 5308416. Its totient is φ = 1048800.

The previous prime is 2782861. The next prime is 2782877. The reversal of 2782870 is 782872.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14475 + ... + 14665.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

2^2782870 is an apocalyptic number.

2782870 is a deficient number, since it is larger than the sum of its proper divisors (2525546).

2782870 is a wasteful number, since it uses less digits than its factorization.

2782870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 2782870 is about 1668.1936338447. The cubic root of 2782870 is about 140.6579573783.

The spelling of 2782870 in words is "two million, seven hundred eighty-two thousand, eight hundred seventy".