2645240 has 32 divisors (see below), whose sum is σ = 6410880. Its totient is φ = 976512.

The previous prime is 2645239. The next prime is 2645257. The reversal of 2645240 is 425462.

2645240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2024 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

2^2645240 is an apocalyptic number.

2645240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2645240 is an abundant number, since it is smaller than the sum of its proper divisors (3765640).

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

2645240 is a wasteful number, since it uses less digits than its factorization.

2645240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111 (or 5107 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2645240 is about 1626.4193801108. The cubic root of 2645240 is about 138.2998451219.

The spelling of 2645240 in words is "two million, six hundred forty-five thousand, two hundred forty".