28776280532 has 24 divisors (see below), whose sum is σ = 50502531240. Its totient is φ = 14347043840.

The previous prime is 28776280531. The next prime is 28776280537. The reversal of 28776280532 is 23508267782.

It can be written as a sum of positive squares in 4 ways, for example, as 9398526916 + 19377753616 = 96946^2 + 139204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776280531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217182 + ... + 2230122.

It is an arithmetic number, because the mean of its divisors is an integer number (2104272135).

Almost surely, 2^28776280532 is an apocalyptic number.

It is an amenable number.

28776280532 is a deficient number, since it is larger than the sum of its proper divisors (21726250708).

28776280532 is a wasteful number, since it uses less digits than its factorization.

28776280532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14491 (or 14489 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 28776280532 in words is "twenty-eight billion, seven hundred seventy-six million, two hundred eighty thousand, five hundred thirty-two".