22743640 has 32 divisors (see below), whose sum is σ = 51316560. Its totient is φ = 9072000.

The previous prime is 22743607. The next prime is 22743649. The reversal of 22743640 is 4634722.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22743599 and 22743608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22743649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21115 + ... + 22165.

Almost surely, 2^22743640 is an apocalyptic number.

22743640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22743640 is an abundant number, since it is smaller than the sum of its proper divisors (28572920).

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

22743640 is a wasteful number, since it uses less digits than its factorization.

22743640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1599 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 22743640 is about 4769.0292513257. The cubic root of 22743640 is about 283.3261482223.

The spelling of 22743640 in words is "twenty-two million, seven hundred forty-three thousand, six hundred forty".