28454821249 has 8 divisors (see below), whose sum is σ = 30104490240. Its totient is φ = 26820356976.

The previous prime is 28454821237. The next prime is 28454821309. The reversal of 28454821249 is 94212845482.

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

It is a cyclic number.

It is not a de Polignac number, because 28454821249 - 2⁷ = 28454821121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28454825249) 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, 3797329 + ... + 3804814.

It is an arithmetic number, because the mean of its divisors is an integer number (3763061280).

Almost surely, 2^28454821249 is an apocalyptic number.

It is an amenable number.

28454821249 is a deficient number, since it is larger than the sum of its proper divisors (1649668991).

28454821249 is a wasteful number, since it uses less digits than its factorization.

28454821249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602359.

The product of its digits is 1474560, while the sum is 49.

The spelling of 28454821249 in words is "twenty-eight billion, four hundred fifty-four million, eight hundred twenty-one thousand, two hundred forty-nine".