28809652928 has 28 divisors (see below), whose sum is σ = 65336178192. Its totient is φ = 12346993920.

The previous prime is 28809652919. The next prime is 28809652943. The reversal of 28809652928 is 82925690882.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×28809652928² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32153183 + ... + 32154078.

Almost surely, 2^28809652928 is an apocalyptic number.

28809652928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28809652928 is an abundant number, since it is smaller than the sum of its proper divisors (36526525264).

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

28809652928 is an equidigital number, since it uses as much as digits as its factorization.

28809652928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64307280 (or 64307270 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 28809652928 in words is "twenty-eight billion, eight hundred nine million, six hundred fifty-two thousand, nine hundred twenty-eight".