7240689 has 6 divisors (see below), whose sum is σ = 10458786. Its totient is φ = 4827120.

The previous prime is 7240687. The next prime is 7240693. The reversal of 7240689 is 9860427.

It can be written as a sum of positive squares in only one way, i.e., 6290064 + 950625 = 2508^2 + 975^2 .

It is not a de Polignac number, because 7240689 - 2¹ = 7240687 is a prime.

7240689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7240687) 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, 402252 + ... + 402269.

It is an arithmetic number, because the mean of its divisors is an integer number (1743131).

Almost surely, 2^7240689 is an apocalyptic number.

It is an amenable number.

7240689 is a deficient number, since it is larger than the sum of its proper divisors (3218097).

7240689 is a wasteful number, since it uses less digits than its factorization.

7240689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804527 (or 804524 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 7240689 is about 2690.8528387855. The cubic root of 7240689 is about 193.4609419794.

The spelling of 7240689 in words is "seven million, two hundred forty thousand, six hundred eighty-nine".