22248729 has 16 divisors (see below), whose sum is σ = 33853440. Its totient is φ = 14430960.

The previous prime is 22248727. The next prime is 22248739. The reversal of 22248729 is 92784222.

It is a happy number.

It is not a de Polignac number, because 22248729 - 2¹ = 22248727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22248693 and 22248702.

It is not an unprimeable number, because it can be changed into a prime (22248727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10137 + ... + 12134.

It is an arithmetic number, because the mean of its divisors is an integer number (2115840).

Almost surely, 2^22248729 is an apocalyptic number.

It is an amenable number.

22248729 is a deficient number, since it is larger than the sum of its proper divisors (11604711).

22248729 is a wasteful number, since it uses less digits than its factorization.

22248729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22317 (or 22311 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 22248729 is about 4716.8558383737. The cubic root of 22248729 is about 281.2559607626.

The spelling of 22248729 in words is "twenty-two million, two hundred forty-eight thousand, seven hundred twenty-nine".