22741240 has 64 divisors (see below), whose sum is σ = 55287360. Its totient is φ = 8386560.

The previous prime is 22741237. The next prime is 22741241. The reversal of 22741240 is 4214722.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22741241) 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 15 ways as a sum of consecutive naturals, for example, 35725 + ... + 36355.

It is an arithmetic number, because the mean of its divisors is an integer number (863865).

Almost surely, 2^22741240 is an apocalyptic number.

22741240 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 22741240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27643680).

22741240 is an abundant number, since it is smaller than the sum of its proper divisors (32546120).

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

22741240 is a wasteful number, since it uses less digits than its factorization.

22741240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 22741240 is about 4768.7776211520. Note that the first 3 decimals coincide. The cubic root of 22741240 is about 283.3161819683.

Adding to 22741240 its reverse (4214722), we get a palindrome (26955962).

The spelling of 22741240 in words is "twenty-two million, seven hundred forty-one thousand, two hundred forty".