22478429 has 4 divisors (see below), whose sum is σ = 23455776. Its totient is φ = 21501084.

The previous prime is 22478419. The next prime is 22478461. The reversal of 22478429 is 92487422.

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.

It is a cyclic number.

It is not a de Polignac number, because 22478429 - 2¹⁶ = 22412893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22478392 and 22478401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22478419) 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, 488639 + ... + 488684.

It is an arithmetic number, because the mean of its divisors is an integer number (5863944).

Almost surely, 2^22478429 is an apocalyptic number.

It is an amenable number.

22478429 is a deficient number, since it is larger than the sum of its proper divisors (977347).

22478429 is an equidigital number, since it uses as much as digits as its factorization.

22478429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977346.

The product of its digits is 64512, while the sum is 38.

The square root of 22478429 is about 4741.1421619690. The cubic root of 22478429 is about 282.2205616482.

The spelling of 22478429 in words is "twenty-two million, four hundred seventy-eight thousand, four hundred twenty-nine".