28287464605 has 4 divisors (see below), whose sum is σ = 33944957532. Its totient is φ = 22629971680.

The previous prime is 28287464599. The next prime is 28287464633. The reversal of 28287464605 is 50646478282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14686773721 + 13600690884 = 121189^2 + 116622^2 .

It is not a de Polignac number, because 28287464605 - 2⁷ = 28287464477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828746456 + ... + 2828746465.

It is an arithmetic number, because the mean of its divisors is an integer number (8486239383).

Almost surely, 2^28287464605 is an apocalyptic number.

It is an amenable number.

28287464605 is a deficient number, since it is larger than the sum of its proper divisors (5657492927).

28287464605 is an equidigital number, since it uses as much as digits as its factorization.

28287464605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657492926.

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 28287464605 in words is "twenty-eight billion, two hundred eighty-seven million, four hundred sixty-four thousand, six hundred five".