22032729 has 10 divisors (see below), whose sum is σ = 32913210. Its totient is φ = 14688432.

The previous prime is 22032709. The next prime is 22032743. The reversal of 22032729 is 92723022.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 5992704 = 4005^2 + 2448^2 .

It is not a de Polignac number, because 22032729 - 2⁷ = 22032601 is a prime.

It is a super-2 number, since 2×22032729² = 970882294374882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22032709) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 135924 + ... + 136085.

It is an arithmetic number, because the mean of its divisors is an integer number (3291321).

Almost surely, 2^22032729 is an apocalyptic number.

It is an amenable number.

22032729 is a deficient number, since it is larger than the sum of its proper divisors (10880481).

22032729 is an equidigital number, since it uses as much as digits as its factorization.

22032729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272021 (or 272012 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22032729 is about 4693.9033863087. The cubic root of 22032729 is about 280.3428156495.

The spelling of 22032729 in words is "twenty-two million, thirty-two thousand, seven hundred twenty-nine".