22724540 has 12 divisors (see below), whose sum is σ = 47721576. Its totient is φ = 9089808.

The previous prime is 22724501. The next prime is 22724543. The reversal of 22724540 is 4542722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22724543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568094 + ... + 568133.

It is an arithmetic number, because the mean of its divisors is an integer number (3976798).

Almost surely, 2^22724540 is an apocalyptic number.

22724540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22724540 is an abundant number, since it is smaller than the sum of its proper divisors (24997036).

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

22724540 is a wasteful number, since it uses less digits than its factorization.

22724540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136236 (or 1136234 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 22724540 is about 4767.0263267576. The cubic root of 22724540 is about 283.2468140289.

The spelling of 22724540 in words is "twenty-two million, seven hundred twenty-four thousand, five hundred forty".