22729730 has 8 divisors (see below), whose sum is σ = 40913532. Its totient is φ = 9091888.

The previous prime is 22729709. The next prime is 22729741. The reversal of 22729730 is 3792722.

It can be written as a sum of positive squares in 2 ways, for example, as 20693401 + 2036329 = 4549^2 + 1427^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136477 + ... + 1136496.

Almost surely, 2^22729730 is an apocalyptic number.

22729730 is a deficient number, since it is larger than the sum of its proper divisors (18183802).

22729730 is a wasteful number, since it uses less digits than its factorization.

22729730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272980.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 22729730 is about 4767.5706602000. The cubic root of 22729730 is about 283.2683757278.

The spelling of 22729730 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred thirty".