22406387 has 2 divisors, whose sum is σ = 22406388. Its totient is φ = 22406386.

The previous prime is 22406381. The next prime is 22406411. The reversal of 22406387 is 78360422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22406387 - 2¹⁰ = 22405363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22406381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203193 + 11203194.

It is an arithmetic number, because the mean of its divisors is an integer number (11203194).

Almost surely, 2^22406387 is an apocalyptic number.

22406387 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406387 is an equidigital number, since it uses as much as digits as its factorization.

22406387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 22406387 is about 4733.5385284161. The cubic root of 22406387 is about 281.9187390562.

The spelling of 22406387 in words is "twenty-two million, four hundred six thousand, three hundred eighty-seven".