2865864 has 32 divisors (see below), whose sum is σ = 7333920. Its totient is φ = 932736.

The previous prime is 2865839. The next prime is 2865871. The reversal of 2865864 is 4685682.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357 + ... + 2420.

It is an arithmetic number, because the mean of its divisors is an integer number (229185).

2^2865864 is an apocalyptic number.

2865864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2865864 is an abundant number, since it is smaller than the sum of its proper divisors (4468056).

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

2865864 is a wasteful number, since it uses less digits than its factorization.

2865864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829 (or 2825 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 2865864 is about 1692.8862926966. The cubic root of 2865864 is about 142.0425713792.

The spelling of 2865864 in words is "two million, eight hundred sixty-five thousand, eight hundred sixty-four".