24720240 has 40 divisors (see below), whose sum is σ = 76633488. Its totient is φ = 6592000.

The previous prime is 24720229. The next prime is 24720247. The reversal of 24720240 is 4202742.

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

It is a super-2 number, since 2×24720240² = 1222180531315200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24720247) 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 7 ways as a sum of consecutive naturals, for example, 51261 + ... + 51740.

Almost surely, 2^24720240 is an apocalyptic number.

24720240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24720240 is an abundant number, since it is smaller than the sum of its proper divisors (51913248).

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

24720240 is a wasteful number, since it uses less digits than its factorization.

24720240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103017 (or 103011 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 24720240 is about 4971.9452933434. The cubic root of 24720240 is about 291.3069822872.

Adding to 24720240 its reverse (4202742), we get a palindrome (28922982).

The spelling of 24720240 in words is "twenty-four million, seven hundred twenty thousand, two hundred forty".