24722240 has 56 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 9456128.

The previous prime is 24722213. The next prime is 24722251. The reversal of 24722240 is 4222742.

It is a happy number.

It is a super-2 number, since 2×24722240² = 1222378301235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5681 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (1097280).

Almost surely, 2^24722240 is an apocalyptic number.

24722240 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 24722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30723840).

24722240 is an abundant number, since it is smaller than the sum of its proper divisors (36725440).

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

24722240 is a wasteful number, since it uses less digits than its factorization.

24722240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3389 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 24722240 is about 4972.1464177958. The cubic root of 24722240 is about 291.3148381744.

Adding to 24722240 its reverse (4222742), we get a palindrome (28944982).

The spelling of 24722240 in words is "twenty-four million, seven hundred twenty-two thousand, two hundred forty".