22729765 has 16 divisors (see below), whose sum is σ = 29879280. Its totient is φ = 16522240.

The previous prime is 22729753. The next prime is 22729769. The reversal of 22729765 is 56792722.

It can be written as a sum of positive squares in 8 ways, for example, as 2461761 + 20268004 = 1569^2 + 4502^2 .

It is not a de Polignac number, because 22729765 - 2⁹ = 22729253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729769) 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, 2146 + ... + 7075.

It is an arithmetic number, because the mean of its divisors is an integer number (1867455).

Almost surely, 2^22729765 is an apocalyptic number.

It is an amenable number.

22729765 is a deficient number, since it is larger than the sum of its proper divisors (7149515).

22729765 is a wasteful number, since it uses less digits than its factorization.

22729765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9272.

The product of its digits is 105840, while the sum is 40.

The square root of 22729765 is about 4767.5743308311. The cubic root of 22729765 is about 283.2685211231.

It can be divided in two parts, 227 and 29765, that added together give a palindrome (29992).

The spelling of 22729765 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred sixty-five".