2455440 has 80 divisors (see below), whose sum is σ = 8207808. Its totient is φ = 603648.

The previous prime is 2455423. The next prime is 2455447. The reversal of 2455440 is 445542.

2455440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2455440.

It is not an unprimeable number, because it can be changed into a prime (2455447) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2727 + ... + 3513.

2^2455440 is an apocalyptic number.

2455440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2455440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4103904).

2455440 is an abundant number, since it is smaller than the sum of its proper divisors (5752368).

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

2455440 is a wasteful number, since it uses less digits than its factorization.

2455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 2455440 is about 1566.9843649507. The cubic root of 2455440 is about 134.9096789536.

The spelling of 2455440 in words is "two million, four hundred fifty-five thousand, four hundred forty".