28780791675 has 48 divisors (see below), whose sum is σ = 47838173280. Its totient is φ = 15268055040.

The previous prime is 28780791667. The next prime is 28780791703. The reversal of 28780791675 is 57619708782.

It is not a de Polignac number, because 28780791675 - 2³ = 28780791667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20961289 + ... + 20962661.

It is an arithmetic number, because the mean of its divisors is an integer number (996628610).

Almost surely, 2^28780791675 is an apocalyptic number.

28780791675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28780791675 is a deficient number, since it is larger than the sum of its proper divisors (19057381605).

28780791675 is a wasteful number, since it uses less digits than its factorization.

28780791675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672 (or 2667 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 60.

The spelling of 28780791675 in words is "twenty-eight billion, seven hundred eighty million, seven hundred ninety-one thousand, six hundred seventy-five".