28108276812 has 72 divisors (see below), whose sum is σ = 88583668992. Its totient is φ = 7300850400.

The previous prime is 28108276811. The next prime is 28108276877. The reversal of 28108276812 is 21867280182.

It is a happy number.

It is a super-3 number, since 3×28108276812³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28108276811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5067264 + ... + 5072807.

It is an arithmetic number, because the mean of its divisors is an integer number (1230328736).

Almost surely, 2^28108276812 is an apocalyptic number.

28108276812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28108276812 is an abundant number, since it is smaller than the sum of its proper divisors (60475392180).

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

28108276812 is a wasteful number, since it uses less digits than its factorization.

28108276812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10140099 (or 10140094 counting only the distinct ones).

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

The spelling of 28108276812 in words is "twenty-eight billion, one hundred eight million, two hundred seventy-six thousand, eight hundred twelve".