2787039 has 6 divisors (see below), whose sum is σ = 4025736. Its totient is φ = 1858020.

The previous prime is 2787023. The next prime is 2787049. The reversal of 2787039 is 9307872.

It is not a de Polignac number, because 2787039 - 2⁴ = 2787023 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2786994 and 2787012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787019) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 154827 + ... + 154844.

It is an arithmetic number, because the mean of its divisors is an integer number (670956).

2^2787039 is an apocalyptic number.

2787039 is a deficient number, since it is larger than the sum of its proper divisors (1238697).

2787039 is a wasteful number, since it uses less digits than its factorization.

2787039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309677 (or 309674 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2787039 is about 1669.4427213894. The cubic root of 2787039 is about 140.7281619319.

The spelling of 2787039 in words is "two million, seven hundred eighty-seven thousand, thirty-nine".