2865870 has 48 divisors (see below), whose sum is σ = 8517600. Its totient is φ = 654912.

The previous prime is 2865839. The next prime is 2865871. The reversal of 2865870 is 785682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1645 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (177450).

2^2865870 is an apocalyptic number.

2865870 is an abundant number, since it is smaller than the sum of its proper divisors (5651730).

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

2865870 is a wasteful number, since it uses less digits than its factorization.

2865870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569 (or 4566 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2865870 is about 1692.8880648170. Note that the first 3 decimals coincide. The cubic root of 2865870 is about 142.0426705064.

The spelling of 2865870 in words is "two million, eight hundred sixty-five thousand, eight hundred seventy".