22408129 has 4 divisors (see below), whose sum is σ = 22418176. Its totient is φ = 22398084.

The previous prime is 22408109. The next prime is 22408151. The reversal of 22408129 is 92180422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22408129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22408097 and 22408106.

It is not an unprimeable number, because it can be changed into a prime (22408109) 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, 9 + ... + 6694.

It is an arithmetic number, because the mean of its divisors is an integer number (5604544).

Almost surely, 2^22408129 is an apocalyptic number.

It is an amenable number.

22408129 is a deficient number, since it is larger than the sum of its proper divisors (10047).

22408129 is an equidigital number, since it uses as much as digits as its factorization.

22408129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22408129 is about 4733.7225309475. The cubic root of 22408129 is about 281.9260448557.

The spelling of 22408129 in words is "twenty-two million, four hundred eight thousand, one hundred twenty-nine".