22729779 has 6 divisors (see below), whose sum is σ = 32831916. Its totient is φ = 15153180.

The previous prime is 22729769. The next prime is 22729781. The reversal of 22729779 is 97792722.

It is not a de Polignac number, because 22729779 - 2⁸ = 22729523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22729709) 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 5 ways as a sum of consecutive naturals, for example, 1262757 + ... + 1262774.

It is an arithmetic number, because the mean of its divisors is an integer number (5471986).

Almost surely, 2^22729779 is an apocalyptic number.

22729779 is a deficient number, since it is larger than the sum of its proper divisors (10102137).

22729779 is a wasteful number, since it uses less digits than its factorization.

22729779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525537 (or 2525534 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 22729779 is about 4767.5757990828. The cubic root of 22729779 is about 283.2685792812.

The spelling of 22729779 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred seventy-nine".