22729546 has 8 divisors (see below), whose sum is σ = 38964960. Its totient is φ = 9741228.

The previous prime is 22729523. The next prime is 22729547. The reversal of 22729546 is 64592722.

It is a happy number.

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

It is a super-2 number, since 2×22729546² = 1033264522732232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22729547) 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 3 ways as a sum of consecutive naturals, for example, 811756 + ... + 811783.

It is an arithmetic number, because the mean of its divisors is an integer number (4870620).

Almost surely, 2^22729546 is an apocalyptic number.

22729546 is a deficient number, since it is larger than the sum of its proper divisors (16235414).

22729546 is a wasteful number, since it uses less digits than its factorization.

22729546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623548.

The product of its digits is 60480, while the sum is 37.

The square root of 22729546 is about 4767.5513631213. The cubic root of 22729546 is about 283.2676113615.

The spelling of 22729546 in words is "twenty-two million, seven hundred twenty-nine thousand, five hundred forty-six".