422218729 has 8 divisors (see below), whose sum is σ = 447619328. Its totient is φ = 397554480.

The previous prime is 422218721. The next prime is 422218747. The reversal of 422218729 is 927812224.

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 422218729 - 2³ = 422218721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422218721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182907 + ... + 185200.

It is an arithmetic number, because the mean of its divisors is an integer number (55952416).

Almost surely, 2^422218729 is an apocalyptic number.

It is an amenable number.

422218729 is a deficient number, since it is larger than the sum of its proper divisors (25400599).

422218729 is a wasteful number, since it uses less digits than its factorization.

422218729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368175.

The product of its digits is 32256, while the sum is 37.

The square root of 422218729 is about 20547.9616750665. The cubic root of 422218729 is about 750.2036359641.

The spelling of 422218729 in words is "four hundred twenty-two million, two hundred eighteen thousand, seven hundred twenty-nine".