2788865 has 8 divisors (see below), whose sum is σ = 3492288. Its totient is φ = 2134000.

The previous prime is 2788831. The next prime is 2788889. The reversal of 2788865 is 5688872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2788865 - 2¹⁴ = 2772481 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 12011 + ... + 12240.

It is an arithmetic number, because the mean of its divisors is an integer number (436536).

2^2788865 is an apocalyptic number.

It is an amenable number.

2788865 is a deficient number, since it is larger than the sum of its proper divisors (703423).

2788865 is a wasteful number, since it uses less digits than its factorization.

2788865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24279.

The product of its digits is 215040, while the sum is 44.

The square root of 2788865 is about 1669.9895209252. The cubic root of 2788865 is about 140.7588891092.

The spelling of 2788865 in words is "two million, seven hundred eighty-eight thousand, eight hundred sixty-five".