2523440 has 20 divisors (see below), whose sum is σ = 5867184. Its totient is φ = 1009344.

The previous prime is 2523419. The next prime is 2523457. The reversal of 2523440 is 443252.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15692 + ... + 15851.

2^2523440 is an apocalyptic number.

2523440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2523440 is an abundant number, since it is smaller than the sum of its proper divisors (3343744).

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

2523440 is a wasteful number, since it uses less digits than its factorization.

2523440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31556 (or 31550 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 2523440 is about 1588.5339152816. The cubic root of 2523440 is about 136.1437350031.

Adding to 2523440 its reverse (443252), we get a palindrome (2966692).

The spelling of 2523440 in words is "two million, five hundred twenty-three thousand, four hundred forty".