28102312580 has 48 divisors (see below), whose sum is σ = 59233867056. Its totient is φ = 11199283200.

The previous prime is 28102312573. The next prime is 28102312583. The reversal of 28102312580 is 8521320182.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3485957764 + 24616354816 = 59042^2 + 156896^2 .

It is not an unprimeable number, because it can be changed into a prime (28102312583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8956772 + ... + 8959908.

It is an arithmetic number, because the mean of its divisors is an integer number (1234038897).

Almost surely, 2^28102312580 is an apocalyptic number.

28102312580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28102312580 is an abundant number, since it is smaller than the sum of its proper divisors (31131554476).

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

28102312580 is a wasteful number, since it uses less digits than its factorization.

28102312580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664 (or 4662 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 28102312580 in words is "twenty-eight billion, one hundred two million, three hundred twelve thousand, five hundred eighty".