2491188 has 48 divisors (see below), whose sum is σ = 6795264. Its totient is φ = 695520.

The previous prime is 2491171. The next prime is 2491189. The reversal of 2491188 is 8811942.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491189) 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, 3633 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (141568).

2^2491188 is an apocalyptic number.

2491188 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 2491188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3397632).

2491188 is an abundant number, since it is smaller than the sum of its proper divisors (4304076).

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

2491188 is a wasteful number, since it uses less digits than its factorization.

2491188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 690 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 2491188 is about 1578.3497711217. The cubic root of 2491188 is about 135.5612301167.

The spelling of 2491188 in words is "two million, four hundred ninety-one thousand, one hundred eighty-eight".