2445440 has 32 divisors (see below), whose sum is σ = 5847660. Its totient is φ = 977920.

The previous prime is 2445437. The next prime is 2445451. The reversal of 2445440 is 445442.

It can be written as a sum of positive squares in 2 ways, for example, as 2383936 + 61504 = 1544^2 + 248^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 1271 + ... + 2550.

2^2445440 is an apocalyptic number.

2445440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2445440 is an abundant number, since it is smaller than the sum of its proper divisors (3402220).

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

2445440 is an equidigital number, since it uses as much as digits as its factorization.

2445440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 2445440 is about 1563.7902672673. The cubic root of 2445440 is about 134.7262858369.

The spelling of 2445440 in words is "two million, four hundred forty-five thousand, four hundred forty".