24428321 has 4 divisors (see below), whose sum is σ = 24578352. Its totient is φ = 24278292.

The previous prime is 24428293. The next prime is 24428329. The reversal of 24428321 is 12382442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12382442 = 2 ⋅6191221.

It is a cyclic number.

It is not a de Polignac number, because 24428321 - 2¹⁰ = 24427297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24428329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74771 + ... + 75096.

It is an arithmetic number, because the mean of its divisors is an integer number (6144588).

Almost surely, 2^24428321 is an apocalyptic number.

It is an amenable number.

24428321 is a deficient number, since it is larger than the sum of its proper divisors (150031).

24428321 is a wasteful number, since it uses less digits than its factorization.

24428321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150030.

The product of its digits is 3072, while the sum is 26.

The square root of 24428321 is about 4942.5014921596. The cubic root of 24428321 is about 290.1557664972.

The spelling of 24428321 in words is "twenty-four million, four hundred twenty-eight thousand, three hundred twenty-one".