28287334441 has 4 divisors (see below), whose sum is σ = 28945179472. Its totient is φ = 27629489412.

The previous prime is 28287334333. The next prime is 28287334469. The reversal of 28287334441 is 14443378282.

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: 14443378282 = 2 ⋅7221689141.

It is a cyclic number.

It is not a de Polignac number, because 28287334441 - 2⁹ = 28287333929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28287334391 and 28287334400.

It is not an unprimeable number, because it can be changed into a prime (28287334241) 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, 328922451 + ... + 328922536.

It is an arithmetic number, because the mean of its divisors is an integer number (7236294868).

Almost surely, 2^28287334441 is an apocalyptic number.

It is an amenable number.

28287334441 is a deficient number, since it is larger than the sum of its proper divisors (657845031).

28287334441 is an equidigital number, since it uses as much as digits as its factorization.

28287334441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657845030.

The product of its digits is 1032192, while the sum is 46.

The spelling of 28287334441 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, four hundred forty-one".