7057440 has 216 divisors, whose sum is σ = 26977860. Its totient is φ = 1677312.

The previous prime is 7057409. The next prime is 7057441. The reversal of 7057440 is 447507.

It can be written as a sum of positive squares in 6 ways, for example, as 767376 + 6290064 = 876^2 + 2508^2 .

It is not an unprimeable number, because it can be changed into a prime (7057441) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 243346 + ... + 243374.

Almost surely, 2^7057440 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 7057440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13488930).

7057440 is an abundant number, since it is smaller than the sum of its proper divisors (19920420).

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

7057440 is a wasteful number, since it uses less digits than its factorization.

7057440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 7057440 is about 2656.5842730845. The cubic root of 7057440 is about 191.8149258258.

The spelling of 7057440 in words is "seven million, fifty-seven thousand, four hundred forty".