2288919 has 4 divisors (see below), whose sum is σ = 3051896. Its totient is φ = 1525944.

The previous prime is 2288893. The next prime is 2288927. The reversal of 2288919 is 9198822.

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

It is not a de Polignac number, because 2288919 - 2⁵ = 2288887 is a prime.

It is a super-2 number, since 2×2288919² = 10478300377122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2288929) 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, 381484 + ... + 381489.

It is an arithmetic number, because the mean of its divisors is an integer number (762974).

2^2288919 is an apocalyptic number.

2288919 is a deficient number, since it is larger than the sum of its proper divisors (762977).

2288919 is an equidigital number, since it uses as much as digits as its factorization.

2288919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762976.

The product of its digits is 20736, while the sum is 39.

The square root of 2288919 is about 1512.9173804276. The cubic root of 2288919 is about 131.7882854983.

Subtracting 2288919 from its reverse (9198822), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2288919 in words is "two million, two hundred eighty-eight thousand, nine hundred nineteen".