7440057 has 6 divisors (see below), whose sum is σ = 10746762. Its totient is φ = 4960032.

The previous prime is 7440049. The next prime is 7440061. The reversal of 7440057 is 7500447.

It can be written as a sum of positive squares in only one way, i.e., 7420176 + 19881 = 2724^2 + 141^2 .

It is not a de Polignac number, because 7440057 - 2³ = 7440049 is a prime.

7440057 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7440057.

It is not an unprimeable number, because it can be changed into a prime (7440047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413328 + ... + 413345.

It is an arithmetic number, because the mean of its divisors is an integer number (1791127).

Almost surely, 2^7440057 is an apocalyptic number.

It is an amenable number.

7440057 is a deficient number, since it is larger than the sum of its proper divisors (3306705).

7440057 is a wasteful number, since it uses less digits than its factorization.

7440057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826679 (or 826676 counting only the distinct ones).

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

The square root of 7440057 is about 2727.6467879841. The cubic root of 7440057 is about 195.2205000781.

The spelling of 7440057 in words is "seven million, four hundred forty thousand, fifty-seven".