2391888 has 20 divisors (see below), whose sum is σ = 6179168. Its totient is φ = 797280.

The previous prime is 2391881. The next prime is 2391889. The reversal of 2391888 is 8881932.

2391888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2391888² = 11442256409088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24868 + ... + 24963.

2^2391888 is an apocalyptic number.

It is an amenable number.

2391888 is an abundant number, since it is smaller than the sum of its proper divisors (3787280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2391888 is a wasteful number, since it uses less digits than its factorization.

2391888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49842 (or 49836 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 2391888 is about 1546.5729856686. The cubic root of 2391888 is about 133.7355741858.

The spelling of 2391888 in words is "two million, three hundred ninety-one thousand, eight hundred eighty-eight".