28786233380 has 24 divisors (see below), whose sum is σ = 60675826680. Its totient is φ = 11471686400.

The previous prime is 28786233323. The next prime is 28786233383. The reversal of 28786233380 is 8333268782.

It can be written as a sum of positive squares in 4 ways, for example, as 1827220516 + 26959012864 = 42746^2 + 164192^2 .

It is not an unprimeable number, because it can be changed into a prime (28786233383) 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, 2669921 + ... + 2680680.

It is an arithmetic number, because the mean of its divisors is an integer number (2528159445).

Almost surely, 2^28786233380 is an apocalyptic number.

28786233380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28786233380 is an abundant number, since it is smaller than the sum of its proper divisors (31889593300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28786233380 is a wasteful number, since it uses less digits than its factorization.

28786233380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350879 (or 5350877 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 28786233380 in words is "twenty-eight billion, seven hundred eighty-six million, two hundred thirty-three thousand, three hundred eighty".