28247085461 has 4 divisors (see below), whose sum is σ = 32282383392. Its totient is φ = 24211787532.

The previous prime is 28247085443. The next prime is 28247085463. The reversal of 28247085461 is 16458074282.

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.

It is a cyclic number.

It is not a de Polignac number, because 28247085461 - 2¹⁸ = 28246823317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28247085463) 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, 2017648955 + ... + 2017648968.

It is an arithmetic number, because the mean of its divisors is an integer number (8070595848).

Almost surely, 2^28247085461 is an apocalyptic number.

It is an amenable number.

28247085461 is a deficient number, since it is larger than the sum of its proper divisors (4035297931).

28247085461 is an equidigital number, since it uses as much as digits as its factorization.

28247085461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035297930.

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 28247085461 in words is "twenty-eight billion, two hundred forty-seven million, eighty-five thousand, four hundred sixty-one".