22729797 has 12 divisors (see below), whose sum is σ = 32896864. Its totient is φ = 15123240.

The previous prime is 22729793. The next prime is 22729813. The reversal of 22729797 is 79792722.

It is not a de Polignac number, because 22729797 - 2² = 22729793 is a prime.

It is a super-2 number, since 2×22729797² = 1033287343322418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22729793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2928 + ... + 7350.

Almost surely, 2^22729797 is an apocalyptic number.

It is an amenable number.

22729797 is a deficient number, since it is larger than the sum of its proper divisors (10167067).

22729797 is a wasteful number, since it uses less digits than its factorization.

22729797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000 (or 4997 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 22729797 is about 4767.5776868343. The cubic root of 22729797 is about 283.2686540558.

The spelling of 22729797 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred ninety-seven".