2388991 has 8 divisors (see below), whose sum is σ = 2696400. Its totient is φ = 2096640.

The previous prime is 2388983. The next prime is 2389001. The reversal of 2388991 is 1998832.

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

It is a cyclic number.

It is not a de Polignac number, because 2388991 - 2³ = 2388983 is a prime.

It is a Duffinian number.

2388991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2388901) 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, 3426 + ... + 4063.

It is an arithmetic number, because the mean of its divisors is an integer number (337050).

2^2388991 is an apocalyptic number.

2388991 is a deficient number, since it is larger than the sum of its proper divisors (307409).

2388991 is a wasteful number, since it uses less digits than its factorization.

2388991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529.

The product of its digits is 31104, while the sum is 40.

The square root of 2388991 is about 1545.6361150025. The cubic root of 2388991 is about 133.6815598842.

It can be divided in two parts, 238 and 8991, that added together give a palindrome (9229).

The spelling of 2388991 in words is "two million, three hundred eighty-eight thousand, nine hundred ninety-one".