24020040 has 128 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 5625600.

The previous prime is 24020011. The next prime is 24020057. The reversal of 24020040 is 4002042.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 24019998 and 24020025.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40627 + ... + 41213.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^24020040 is an apocalyptic number.

24020040 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 24020040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

24020040 is an abundant number, since it is smaller than the sum of its proper divisors (57265080).

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

24020040 is a wasteful number, since it uses less digits than its factorization.

24020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 24020040 is about 4901.0243827184. The cubic root of 24020040 is about 288.5301769519.

Adding to 24020040 its reverse (4002042), we get a palindrome (28022082).

The spelling of 24020040 in words is "twenty-four million, twenty thousand, forty".