28802447 has 4 divisors (see below), whose sum is σ = 29126160. Its totient is φ = 28478736.

The previous prime is 28802419. The next prime is 28802453. The reversal of 28802447 is 74420882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74420882 = 2 ⋅37210441.

It is a cyclic number.

It is not a de Polignac number, because 28802447 - 2⁶ = 28802383 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 (28802407) 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, 161723 + ... + 161900.

It is an arithmetic number, because the mean of its divisors is an integer number (7281540).

Almost surely, 2^28802447 is an apocalyptic number.

28802447 is a deficient number, since it is larger than the sum of its proper divisors (323713).

28802447 is an equidigital number, since it uses as much as digits as its factorization.

28802447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323712.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28802447 is about 5366.7911269212. The cubic root of 28802447 is about 306.5324540041.

The spelling of 28802447 in words is "twenty-eight million, eight hundred two thousand, four hundred forty-seven".