2497440 has 144 divisors (see below), whose sum is σ = 8848224. Its totient is φ = 591360.

The previous prime is 2497423. The next prime is 2497447. The reversal of 2497440 is 447942.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2497398 and 2497407.

It is not an unprimeable number, because it can be changed into a prime (2497447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58059 + ... + 58101.

It is an arithmetic number, because the mean of its divisors is an integer number (61446).

2^2497440 is an apocalyptic number.

2497440 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 2497440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4424112).

2497440 is an abundant number, since it is smaller than the sum of its proper divisors (6350784).

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

2497440 is a wasteful number, since it uses less digits than its factorization.

2497440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 2497440 is about 1580.3290796540. The cubic root of 2497440 is about 135.6745389475.

The spelling of 2497440 in words is "two million, four hundred ninety-seven thousand, four hundred forty".