7240823 has 4 divisors (see below), whose sum is σ = 7252728. Its totient is φ = 7228920.

The previous prime is 7240811. The next prime is 7240841. The reversal of 7240823 is 3280427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3280427 = 43 ⋅76289.

It is a cyclic number.

It is not a de Polignac number, because 7240823 - 2¹² = 7236727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7240792 and 7240801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4988 + ... + 6273.

It is an arithmetic number, because the mean of its divisors is an integer number (1813182).

Almost surely, 2^7240823 is an apocalyptic number.

7240823 is a deficient number, since it is larger than the sum of its proper divisors (11905).

7240823 is a wasteful number, since it uses less digits than its factorization.

7240823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11904.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 7240823 is about 2690.8777378395. The cubic root of 7240823 is about 193.4621354021.

The spelling of 7240823 in words is "seven million, two hundred forty thousand, eight hundred twenty-three".