22729995 has 12 divisors (see below), whose sum is σ = 39398736. Its totient is φ = 12122640.

The previous prime is 22729991. The next prime is 22730009. The reversal of 22729995 is 59992722.

It is a happy number.

It is not a de Polignac number, because 22729995 - 2² = 22729991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 505111 = 22729995 / (2 + 2 + 7 + 2 + 9 + 9 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 22729995.

It is not an unprimeable number, because it can be changed into a prime (22729991) 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 11 ways as a sum of consecutive naturals, for example, 252511 + ... + 252600.

It is an arithmetic number, because the mean of its divisors is an integer number (3283228).

Almost surely, 2^22729995 is an apocalyptic number.

22729995 is a deficient number, since it is larger than the sum of its proper divisors (16668741).

22729995 is a wasteful number, since it uses less digits than its factorization.

22729995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505122 (or 505119 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 22729995 is about 4767.5984520511. The cubic root of 22729995 is about 283.2694765743.

The spelling of 22729995 in words is "twenty-two million, seven hundred twenty-nine thousand, nine hundred ninety-five".