2597440 has 28 divisors (see below), whose sum is σ = 6185916. Its totient is φ = 1038848.

The previous prime is 2597407. The next prime is 2597453. The reversal of 2597440 is 447952.

It can be written as a sum of positive squares in 2 ways, for example, as 1721344 + 876096 = 1312^2 + 936^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3739 + ... + 4378.

2^2597440 is an apocalyptic number.

2597440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2597440 is an abundant number, since it is smaller than the sum of its proper divisors (3588476).

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

2597440 is an equidigital number, since it uses as much as digits as its factorization.

2597440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2597440 is about 1611.6575318597. The cubic root of 2597440 is about 137.4617414219.

The spelling of 2597440 in words is "two million, five hundred ninety-seven thousand, four hundred forty".