24789989 has 8 divisors (see below), whose sum is σ = 28458048. Its totient is φ = 21153600.

The previous prime is 24789977. The next prime is 24789991. The reversal of 24789989 is 98998742.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24789989 is a prime.

It is a super-2 number, since 2×24789989² = 1229087109240242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24789949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6212 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (3557256).

Almost surely, 2^24789989 is an apocalyptic number.

It is an amenable number.

24789989 is a deficient number, since it is larger than the sum of its proper divisors (3668059).

24789989 is a wasteful number, since it uses less digits than its factorization.

24789989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15835.

The product of its digits is 2612736, while the sum is 56.

The square root of 24789989 is about 4978.9546091524. The cubic root of 24789989 is about 291.5807025389.

The spelling of 24789989 in words is "twenty-four million, seven hundred eighty-nine thousand, nine hundred eighty-nine".