22709000 has 32 divisors (see below), whose sum is σ = 53141400. Its totient is φ = 9083200.

The previous prime is 22708979. The next prime is 22709003. The reversal of 22709000 is 90722.

It can be written as a sum of positive squares in 4 ways, for example, as 1012036 + 21696964 = 1006^2 + 4658^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22709003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10355 + ... + 12354.

Almost surely, 2^22709000 is an apocalyptic number.

22709000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22709000 is an abundant number, since it is smaller than the sum of its proper divisors (30432400).

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

22709000 is a wasteful number, since it uses less digits than its factorization.

22709000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22730 (or 22716 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 22709000 is about 4765.3961010602. The cubic root of 22709000 is about 283.1822339286.

Adding to 22709000 its reverse (90722), we get a palindrome (22799722).

The spelling of 22709000 in words is "twenty-two million, seven hundred nine thousand".