2291788 has 12 divisors (see below), whose sum is σ = 4029480. Its totient is φ = 1140512.

The previous prime is 2291749. The next prime is 2291797. The reversal of 2291788 is 8871922.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (335790).

2^2291788 is an apocalyptic number.

It is an amenable number.

2291788 is a deficient number, since it is larger than the sum of its proper divisors (1737692).

2291788 is a wasteful number, since it uses less digits than its factorization.

2291788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2694 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 2291788 is about 1513.8652515994. The cubic root of 2291788 is about 131.8433249772.

It can be divided in two parts, 22917 and 88, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 2291788 in words is "two million, two hundred ninety-one thousand, seven hundred eighty-eight".