24428381 has 2 divisors, whose sum is σ = 24428382. Its totient is φ = 24428380.

The previous prime is 24428363. The next prime is 24428387. The reversal of 24428381 is 18382442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 5331481 = 4370^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 24428381 - 2¹⁸ = 24166237 is a prime.

It is a super-2 number, since 2×24428381² = 1193491596562322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24428387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12214190 + 12214191.

It is an arithmetic number, because the mean of its divisors is an integer number (12214191).

Almost surely, 2^24428381 is an apocalyptic number.

It is an amenable number.

24428381 is a deficient number, since it is larger than the sum of its proper divisors (1).

24428381 is an equidigital number, since it uses as much as digits as its factorization.

24428381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 32.

The square root of 24428381 is about 4942.5075619568. The cubic root of 24428381 is about 290.1560040538.

It can be divided in two parts, 2442 and 8381, that multiplied together give a palindrome (20466402).

The spelling of 24428381 in words is "twenty-four million, four hundred twenty-eight thousand, three hundred eighty-one".