22400723 has 4 divisors (see below), whose sum is σ = 22415448. Its totient is φ = 22386000.

The previous prime is 22400711. The next prime is 22400737. The reversal of 22400723 is 32700422.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22400723 - 2⁶ = 22400659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22400695 and 22400704.

It is not an unprimeable number, because it can be changed into a prime (22400743) 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, 4778 + ... + 8223.

It is an arithmetic number, because the mean of its divisors is an integer number (5603862).

Almost surely, 2^22400723 is an apocalyptic number.

22400723 is a deficient number, since it is larger than the sum of its proper divisors (14725).

22400723 is a wasteful number, since it uses less digits than its factorization.

22400723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14724.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 22400723 is about 4732.9402066791. The cubic root of 22400723 is about 281.8949821053.

The spelling of 22400723 in words is "twenty-two million, four hundred thousand, seven hundred twenty-three".