22400387 has 8 divisors (see below), whose sum is σ = 22703616. Its totient is φ = 22099392.

The previous prime is 22400369. The next prime is 22400419. The reversal of 22400387 is 78300422.

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

It is a cyclic number.

It is not a de Polignac number, because 22400387 - 2¹⁸ = 22138243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400327) 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, 29213 + ... + 29969.

It is an arithmetic number, because the mean of its divisors is an integer number (2837952).

Almost surely, 2^22400387 is an apocalyptic number.

22400387 is a deficient number, since it is larger than the sum of its proper divisors (303229).

22400387 is a wasteful number, since it uses less digits than its factorization.

22400387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117.

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

The square root of 22400387 is about 4732.9047106402. The cubic root of 22400387 is about 281.8935726688.

The spelling of 22400387 in words is "twenty-two million, four hundred thousand, three hundred eighty-seven".