28316477377 has 4 divisors (see below), whose sum is σ = 28317229780. Its totient is φ = 28315724976.

The previous prime is 28316477353. The next prime is 28316477407. The reversal of 28316477377 is 77377461382.

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 26632934416 + 1683542961 = 163196^2 + 41031^2 .

It is a cyclic number.

It is not a de Polignac number, because 28316477377 - 2¹⁵ = 28316444609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28316477317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316602 + ... + 396067.

It is an arithmetic number, because the mean of its divisors is an integer number (7079307445).

Almost surely, 2^28316477377 is an apocalyptic number.

It is an amenable number.

28316477377 is a deficient number, since it is larger than the sum of its proper divisors (752403).

28316477377 is an equidigital number, since it uses as much as digits as its factorization.

28316477377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752402.

The product of its digits is 8297856, while the sum is 55.

The spelling of 28316477377 in words is "twenty-eight billion, three hundred sixteen million, four hundred seventy-seven thousand, three hundred seventy-seven".