22729825 has 12 divisors (see below), whose sum is σ = 28410880. Its totient is φ = 18038160.

The previous prime is 22729813. The next prime is 22729829. The reversal of 22729825 is 52892722.

It is not a de Polignac number, because 22729825 - 2⁵ = 22729793 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22729829) 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, 405 + ... + 6754.

Almost surely, 2^22729825 is an apocalyptic number.

22729825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22729825 is a deficient number, since it is larger than the sum of its proper divisors (5681055).

22729825 is a wasteful number, since it uses less digits than its factorization.

22729825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296 (or 7291 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 22729825 is about 4767.5806233351. The cubic root of 22729825 is about 283.2687703719.

The spelling of 22729825 in words is "twenty-two million, seven hundred twenty-nine thousand, eight hundred twenty-five".