28870103808 has 864 divisors, whose sum is σ = 109610726400. Its totient is φ = 7427137536.

The previous prime is 28870103807. The next prime is 28870103813. The reversal of 28870103808 is 80830107882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (864).

It is a super-2 number, since 2×28870103808² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28870103803) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 347832535 + ... + 347832617.

Almost surely, 2^28870103808 is an apocalyptic number.

28870103808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28870103808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54805363200).

28870103808 is an abundant number, since it is smaller than the sum of its proper divisors (80740622592).

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

28870103808 is a wasteful number, since it uses less digits than its factorization.

28870103808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 28870103808 in words is "twenty-eight billion, eight hundred seventy million, one hundred three thousand, eight hundred eight".