22729749 has 8 divisors (see below), whose sum is σ = 34635840. Its totient is φ = 12988416.

The previous prime is 22729741. The next prime is 22729753. The reversal of 22729749 is 94792722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22729749 - 2³ = 22729741 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22729749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541164 + ... + 541205.

It is an arithmetic number, because the mean of its divisors is an integer number (4329480).

Almost surely, 2^22729749 is an apocalyptic number.

It is an amenable number.

22729749 is a deficient number, since it is larger than the sum of its proper divisors (11906091).

22729749 is a wasteful number, since it uses less digits than its factorization.

22729749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082379.

The product of its digits is 127008, while the sum is 42.

The square root of 22729749 is about 4767.5726528287. The cubic root of 22729749 is about 283.2684546567.

It can be divided in two parts, 2272 and 9749, that added together give a palindrome (12021).

The spelling of 22729749 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred forty-nine".