2500440 has 64 divisors (see below), whose sum is σ = 7637760. Its totient is φ = 654720.

The previous prime is 2500439. The next prime is 2500441. The reversal of 2500440 is 440052.

It is an interprime number because it is at equal distance from previous prime (2500439) and next prime (2500441).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500441) 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, 7885 + ... + 8195.

It is an arithmetic number, because the mean of its divisors is an integer number (119340).

2^2500440 is an apocalyptic number.

2500440 is a gapful number since it is divisible by the number (20) 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 2500440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3818880).

2500440 is an abundant number, since it is smaller than the sum of its proper divisors (5137320).

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

2500440 is a wasteful number, since it uses less digits than its factorization.

2500440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 2500440 is about 1581.2779641796. The cubic root of 2500440 is about 135.7288426543.

Adding to 2500440 its reverse (440052), we get a palindrome (2940492).

The spelling of 2500440 in words is "two million, five hundred thousand, four hundred forty".