24720540 has 96 divisors (see below), whose sum is σ = 76458816. Its totient is φ = 5928960.

The previous prime is 24720523. The next prime is 24720541. The reversal of 24720540 is 4502742.

It is a super-2 number, since 2×24720540² = 1222210195783200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 24720540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24720541) 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 31 ways as a sum of consecutive naturals, for example, 31594 + ... + 32366.

It is an arithmetic number, because the mean of its divisors is an integer number (796446).

Almost surely, 2^24720540 is an apocalyptic number.

24720540 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 24720540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38229408).

24720540 is an abundant number, since it is smaller than the sum of its proper divisors (51738276).

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

24720540 is a wasteful number, since it uses less digits than its factorization.

24720540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 24720540 is about 4971.9754625300. The cubic root of 24720540 is about 291.3081606973.

The spelling of 24720540 in words is "twenty-four million, seven hundred twenty thousand, five hundred forty".