2540320 has 24 divisors (see below), whose sum is σ = 6001884. Its totient is φ = 1016064.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540320 is 230452.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 242064 = 1516^2 + 492^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2540294 and 2540303.

It is not an unprimeable number, because it can be changed into a prime (2540323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7779 + ... + 8098.

2^2540320 is an apocalyptic number.

2540320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540320 is an abundant number, since it is smaller than the sum of its proper divisors (3461564).

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

2540320 is a wasteful number, since it uses less digits than its factorization.

2540320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892 (or 15884 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 2540320 is about 1593.8381348180. The cubic root of 2540320 is about 136.4466285372.

Adding to 2540320 its reverse (230452), we get a palindrome (2770772).

The spelling of 2540320 in words is "two million, five hundred forty thousand, three hundred twenty".