7455440 has 40 divisors (see below), whose sum is σ = 17764488. Its totient is φ = 2908160.

The previous prime is 7455433. The next prime is 7455443. The reversal of 7455440 is 445547.

It can be written as a sum of positive squares in 4 ways, for example, as 506944 + 6948496 = 712^2 + 2636^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7455443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144 + ... + 4416.

Almost surely, 2^7455440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7455440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8882244).

7455440 is an abundant number, since it is smaller than the sum of its proper divisors (10309048).

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

7455440 is a wasteful number, since it uses less digits than its factorization.

7455440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 7455440 is about 2730.4651618360. The cubic root of 7455440 is about 195.3549528838.

The spelling of 7455440 in words is "seven million, four hundred fifty-five thousand, four hundred forty".