2788287 has 8 divisors (see below), whose sum is σ = 3808560. Its totient is φ = 1813440.

The previous prime is 2788273. The next prime is 2788297. The reversal of 2788287 is 7828872.

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

It is not a de Polignac number, because 2788287 - 2¹⁶ = 2722751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788217) 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, 11212 + ... + 11457.

It is an arithmetic number, because the mean of its divisors is an integer number (476070).

2^2788287 is an apocalyptic number.

2788287 is a deficient number, since it is larger than the sum of its proper divisors (1020273).

2788287 is a wasteful number, since it uses less digits than its factorization.

2788287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22713.

The product of its digits is 100352, while the sum is 42.

The square root of 2788287 is about 1669.8164569796. The cubic root of 2788287 is about 140.7491642140.

The spelling of 2788287 in words is "two million, seven hundred eighty-eight thousand, two hundred eighty-seven".