2491488 has 72 divisors (see below), whose sum is σ = 7292376. Its totient is φ = 806400.

The previous prime is 2491487. The next prime is 2491493. The reversal of 2491488 is 8841942.

2491488 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11703 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (101283).

2^2491488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3646188).

2491488 is an abundant number, since it is smaller than the sum of its proper divisors (4800888).

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

2491488 is a wasteful number, since it uses less digits than its factorization.

2491488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 257 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2491488 is about 1578.4448042298. Note that the first 3 decimals coincide. The cubic root of 2491488 is about 135.5666715281.

Adding to 2491488 its product of digits (18432), we get a triangular number (2509920 = T₂₂₄₀).

The spelling of 2491488 in words is "two million, four hundred ninety-one thousand, four hundred eighty-eight".