22380397 has 4 divisors (see below), whose sum is σ = 24101980. Its totient is φ = 20658816.

The previous prime is 22380361. The next prime is 22380401. The reversal of 22380397 is 79308322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 7123561 = 3906^2 + 2669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22380397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22380307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860772 + ... + 860797.

It is an arithmetic number, because the mean of its divisors is an integer number (6025495).

Almost surely, 2^22380397 is an apocalyptic number.

It is an amenable number.

22380397 is a deficient number, since it is larger than the sum of its proper divisors (1721583).

22380397 is a wasteful number, since it uses less digits than its factorization.

22380397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721582.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 22380397 is about 4730.7924283359. The cubic root of 22380397 is about 281.8096942135.

The spelling of 22380397 in words is "twenty-two million, three hundred eighty thousand, three hundred ninety-seven".