28323146249 has 4 divisors (see below), whose sum is σ = 29236796160. Its totient is φ = 27409496340.

The previous prime is 28323146239. The next prime is 28323146261. The reversal of 28323146249 is 94264132382.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28323146249 is a prime.

It is a super-2 number, since 2×28323146249² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28323146219) 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, 456824909 + ... + 456824970.

It is an arithmetic number, because the mean of its divisors is an integer number (7309199040).

Almost surely, 2^28323146249 is an apocalyptic number.

It is an amenable number.

28323146249 is a deficient number, since it is larger than the sum of its proper divisors (913649911).

28323146249 is an equidigital number, since it uses as much as digits as its factorization.

28323146249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913649910.

The product of its digits is 497664, while the sum is 44.

The spelling of 28323146249 in words is "twenty-eight billion, three hundred twenty-three million, one hundred forty-six thousand, two hundred forty-nine".