2861870 has 16 divisors (see below), whose sum is σ = 5619888. Its totient is φ = 1040640.

The previous prime is 2861869. The next prime is 2861897. The reversal of 2861870 is 781682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12899 + ... + 13118.

It is an arithmetic number, because the mean of its divisors is an integer number (351243).

2^2861870 is an apocalyptic number.

2861870 is a deficient number, since it is larger than the sum of its proper divisors (2758018).

2861870 is a wasteful number, since it uses less digits than its factorization.

2861870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26035.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2861870 is about 1691.7062392744. The cubic root of 2861870 is about 141.9765550131.

The spelling of 2861870 in words is "two million, eight hundred sixty-one thousand, eight hundred seventy".