28851200447 has 4 divisors (see below), whose sum is σ = 28852684896. Its totient is φ = 28849716000.

The previous prime is 28851200431. The next prime is 28851200459. The reversal of 28851200447 is 74400215882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28851200447 - 2⁴ = 28851200431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28851200747) 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, 712679 + ... + 752072.

It is an arithmetic number, because the mean of its divisors is an integer number (7213171224).

Almost surely, 2^28851200447 is an apocalyptic number.

28851200447 is a deficient number, since it is larger than the sum of its proper divisors (1484449).

28851200447 is a wasteful number, since it uses less digits than its factorization.

28851200447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484448.

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 28851200447 in words is "twenty-eight billion, eight hundred fifty-one million, two hundred thousand, four hundred forty-seven".