28316477477 has 4 divisors (see below), whose sum is σ = 28506521100. Its totient is φ = 28126433856.

The previous prime is 28316477447. The next prime is 28316477479. The reversal of 28316477477 is 77477461382.

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 2392579396 + 25923898081 = 48914^2 + 161009^2 .

It is a cyclic number.

It is not a de Polignac number, because 28316477477 - 2¹⁶ = 28316411941 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 (28316477479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95021588 + ... + 95021885.

It is an arithmetic number, because the mean of its divisors is an integer number (7126630275).

Almost surely, 2^28316477477 is an apocalyptic number.

It is an amenable number.

28316477477 is a deficient number, since it is larger than the sum of its proper divisors (190043623).

28316477477 is a wasteful number, since it uses less digits than its factorization.

28316477477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190043622.

The product of its digits is 11063808, while the sum is 56.

The spelling of 28316477477 in words is "twenty-eight billion, three hundred sixteen million, four hundred seventy-seven thousand, four hundred seventy-seven".