22400389 has 8 divisors (see below), whose sum is σ = 24498432. Its totient is φ = 20312640.

The previous prime is 22400369. The next prime is 22400419. The reversal of 22400389 is 98300422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22400389 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 (22400369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2412 + ... + 7114.

It is an arithmetic number, because the mean of its divisors is an integer number (3062304).

Almost surely, 2^22400389 is an apocalyptic number.

It is an amenable number.

22400389 is a deficient number, since it is larger than the sum of its proper divisors (2098043).

22400389 is a wasteful number, since it uses less digits than its factorization.

22400389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22400389 is about 4732.9049219269. The cubic root of 22400389 is about 281.8935810584.

The spelling of 22400389 in words is "twenty-two million, four hundred thousand, three hundred eighty-nine".