2788919 has 4 divisors (see below), whose sum is σ = 3187344. Its totient is φ = 2390496.

The previous prime is 2788889. The next prime is 2788927. The reversal of 2788919 is 9198872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2788919 is a prime.

It is a super-2 number, since 2×2788919² = 15556138377122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2788919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199202 + ... + 199215.

It is an arithmetic number, because the mean of its divisors is an integer number (796836).

2^2788919 is an apocalyptic number.

2788919 is a deficient number, since it is larger than the sum of its proper divisors (398425).

2788919 is an equidigital number, since it uses as much as digits as its factorization.

2788919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398424.

The product of its digits is 72576, while the sum is 44.

The square root of 2788919 is about 1670.0056886131. The cubic root of 2788919 is about 140.7597975948.

The spelling of 2788919 in words is "two million, seven hundred eighty-eight thousand, nine hundred nineteen".