22744720 has 40 divisors (see below), whose sum is σ = 53088120. Its totient is φ = 9062400.

The previous prime is 22744717. The next prime is 22744741. The reversal of 22744720 is 2744722.

It can be written as a sum of positive squares in 4 ways, for example, as 4460544 + 18284176 = 2112^2 + 4276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

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, 31726 + ... + 32434.

It is an arithmetic number, because the mean of its divisors is an integer number (1327203).

Almost surely, 2^22744720 is an apocalyptic number.

22744720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22744720 is an abundant number, since it is smaller than the sum of its proper divisors (30343400).

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

22744720 is a wasteful number, since it uses less digits than its factorization.

22744720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 22744720 is about 4769.1424805724. The cubic root of 22744720 is about 283.3306328078.

The spelling of 22744720 in words is "twenty-two million, seven hundred forty-four thousand, seven hundred twenty".