22729536 has 42 divisors (see below), whose sum is σ = 65151762. Its totient is φ = 7576320.

The previous prime is 22729523. The next prime is 22729547. The reversal of 22729536 is 63592722.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 5089536 = 4200^2 + 2256^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22729536.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19155 + ... + 20306.

Almost surely, 2^22729536 is an apocalyptic number.

It is an amenable number.

22729536 is an abundant number, since it is smaller than the sum of its proper divisors (42422226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22729536 is a wasteful number, since it uses less digits than its factorization.

22729536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39479 (or 39466 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 22729536 is about 4767.5503143648. The cubic root of 22729536 is about 283.2675698197.

The spelling of 22729536 in words is "twenty-two million, seven hundred twenty-nine thousand, five hundred thirty-six".