2491398 has 80 divisors (see below), whose sum is σ = 6911520. Its totient is φ = 657072.

The previous prime is 2491397. The next prime is 2491453. The reversal of 2491398 is 8931942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491397) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 191640 + ... + 191652.

It is an arithmetic number, because the mean of its divisors is an integer number (86394).

2^2491398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3455760).

2491398 is an abundant number, since it is smaller than the sum of its proper divisors (4420122).

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

2491398 is an equidigital number, since it uses as much as digits as its factorization.

2491398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 25 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2491398 is about 1578.4162948981. The cubic root of 2491398 is about 135.5650391506.

The spelling of 2491398 in words is "two million, four hundred ninety-one thousand, three hundred ninety-eight".