2783885 has 8 divisors (see below), whose sum is σ = 3597720. Its totient is φ = 2055744.

The previous prime is 2783873. The next prime is 2783887. The reversal of 2783885 is 5883872.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 2540836 = 493^2 + 1594^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2783885 - 2⁶ = 2783821 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 7⁷ + 8 + 3⁸ + 8 + 8³ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2783887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21350 + ... + 21479.

It is an arithmetic number, because the mean of its divisors is an integer number (449715).

2^2783885 is an apocalyptic number.

It is an amenable number.

2783885 is a deficient number, since it is larger than the sum of its proper divisors (813835).

2783885 is a wasteful number, since it uses less digits than its factorization.

2783885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42847.

The product of its digits is 107520, while the sum is 41.

The square root of 2783885 is about 1668.4978273885. The cubic root of 2783885 is about 140.6750560897.

The spelling of 2783885 in words is "two million, seven hundred eighty-three thousand, eight hundred eighty-five".