24489945 has 40 divisors (see below), whose sum is σ = 46495944. Its totient is φ = 12289536.

The previous prime is 24489943. The next prime is 24489989. The reversal of 24489945 is 54998442.

It can be written as a sum of positive squares in 4 ways, for example, as 1565001 + 22924944 = 1251^2 + 4788^2 .

It is not a de Polignac number, because 24489945 - 2¹ = 24489943 is a prime.

It is a super-2 number, since 2×24489945² = 1199514812206050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 24489945.

It is not an unprimeable number, because it can be changed into a prime (24489943) 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 in 39 ways as a sum of consecutive naturals, for example, 5107 + ... + 8663.

Almost surely, 2^24489945 is an apocalyptic number.

It is an amenable number.

24489945 is a deficient number, since it is larger than the sum of its proper divisors (22005999).

24489945 is a wasteful number, since it uses less digits than its factorization.

24489945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591 (or 3582 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 24489945 is about 4948.7316556871. The cubic root of 24489945 is about 290.3995483567.

The spelling of 24489945 in words is "twenty-four million, four hundred eighty-nine thousand, nine hundred forty-five".