28670440775 has 18 divisors (see below), whose sum is σ = 36061042392. Its totient is φ = 22607678800.

The previous prime is 28670440753. The next prime is 28670440801. The reversal of 28670440775 is 57704407682.

It is not a de Polignac number, because 28670440775 - 2²⁴ = 28653663559 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 17 ways as a sum of consecutive naturals, for example, 7131716 + ... + 7135734.

It is an arithmetic number, because the mean of its divisors is an integer number (2003391244).

Almost surely, 2^28670440775 is an apocalyptic number.

28670440775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28670440775 is a deficient number, since it is larger than the sum of its proper divisors (7390601617).

28670440775 is an frugal number, since it uses more digits than its factorization.

28670440775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 28670440775 in words is "twenty-eight billion, six hundred seventy million, four hundred forty thousand, seven hundred seventy-five".