7445440 has 56 divisors (see below), whose sum is σ = 18105120. Its totient is φ = 2915328.

The previous prime is 7445437. The next prime is 7445441. The reversal of 7445440 is 445447.

It is a junction number, because it is equal to n+sod(n) for n = 7445399 and 7445408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7445441) 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 7 ways as a sum of consecutive naturals, for example, 16741 + ... + 17179.

Almost surely, 2^7445440 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 7445440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9052560).

7445440 is an abundant number, since it is smaller than the sum of its proper divisors (10659680).

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

7445440 is a wasteful number, since it uses less digits than its factorization.

7445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 7445440 is about 2728.6333575620. The cubic root of 7445440 is about 195.2675704439.

The spelling of 7445440 in words is "seven million, four hundred forty-five thousand, four hundred forty".