28800641 has 4 divisors (see below), whose sum is σ = 28887984. Its totient is φ = 28713300.

The previous prime is 28800619. The next prime is 28800647. The reversal of 28800641 is 14600882.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14600882 = 2 ⋅7300441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28800641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28800647) 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, 43175 + ... + 43836.

It is an arithmetic number, because the mean of its divisors is an integer number (7221996).

Almost surely, 2^28800641 is an apocalyptic number.

It is an amenable number.

28800641 is a deficient number, since it is larger than the sum of its proper divisors (87343).

28800641 is an equidigital number, since it uses as much as digits as its factorization.

28800641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87342.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28800641 is about 5366.6228673161. The cubic root of 28800641 is about 306.5260470347.

The spelling of 28800641 in words is "twenty-eight million, eight hundred thousand, six hundred forty-one".