2591988 has 48 divisors (see below), whose sum is σ = 7042560. Its totient is φ = 726624.

The previous prime is 2591987. The next prime is 2592043. The reversal of 2591988 is 8891952.

It is a happy number.

2591988 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4695 + ... + 5217.

It is an arithmetic number, because the mean of its divisors is an integer number (146720).

2^2591988 is an apocalyptic number.

2591988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3521280).

2591988 is an abundant number, since it is smaller than the sum of its proper divisors (4450572).

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

2591988 is a wasteful number, since it uses less digits than its factorization.

2591988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 594 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 2591988 is about 1609.9652170156. The cubic root of 2591988 is about 137.3654971220.

The spelling of 2591988 in words is "two million, five hundred ninety-one thousand, nine hundred eighty-eight".