22749940 has 24 divisors (see below), whose sum is σ = 47994912. Its totient is φ = 9058080.

The previous prime is 22749929. The next prime is 22749941. The reversal of 22749940 is 4994722.

It is a self number, because there is not a number n which added to its sum of digits gives 22749940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22749941) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2035 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (1999788).

Almost surely, 2^22749940 is an apocalyptic number.

22749940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22749940 is an abundant number, since it is smaller than the sum of its proper divisors (25244972).

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

22749940 is a wasteful number, since it uses less digits than its factorization.

22749940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247 (or 5245 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 22749940 is about 4769.6897173716. The cubic root of 22749940 is about 283.3523063035.

The spelling of 22749940 in words is "twenty-two million, seven hundred forty-nine thousand, nine hundred forty".