22743000 has 288 divisors, whose sum is σ = 92720160. Its totient is φ = 4924800.

The previous prime is 22742999. The next prime is 22743011. The reversal of 22743000 is 34722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1196991 + ... + 1197009.

It is an arithmetic number, because the mean of its divisors is an integer number (321945).

Almost surely, 2^22743000 is an apocalyptic number.

22743000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22743000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46360080).

22743000 is an abundant number, since it is smaller than the sum of its proper divisors (69977160).

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

22743000 is a wasteful number, since it uses less digits than its factorization.

22743000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 22743000 is about 4768.9621512442. The cubic root of 22743000 is about 283.3234906231.

Adding to 22743000 its reverse (34722), we get a palindrome (22777722).

The spelling of 22743000 in words is "twenty-two million, seven hundred forty-three thousand".