28332490249 has 4 divisors (see below), whose sum is σ = 32379988864. Its totient is φ = 24284991636.

The previous prime is 28332490247. The next prime is 28332490259. The reversal of 28332490249 is 94209423382.

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 not a de Polignac number, because 28332490249 - 2¹ = 28332490247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28332490199 and 28332490208.

It is not an unprimeable number, because it can be changed into a prime (28332490247) 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, 2023749297 + ... + 2023749310.

It is an arithmetic number, because the mean of its divisors is an integer number (8094997216).

Almost surely, 2^28332490249 is an apocalyptic number.

It is an amenable number.

28332490249 is a deficient number, since it is larger than the sum of its proper divisors (4047498615).

28332490249 is an equidigital number, since it uses as much as digits as its factorization.

28332490249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047498614.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 28332490249 in words is "twenty-eight billion, three hundred thirty-two million, four hundred ninety thousand, two hundred forty-nine".