28671898908 has 12 divisors (see below), whose sum is σ = 66901097480. Its totient is φ = 9557299632.

The previous prime is 28671898903. The next prime is 28671898949. The reversal of 28671898908 is 80989817682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28671898903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194662443 + ... + 1194662466.

Almost surely, 2^28671898908 is an apocalyptic number.

It is an amenable number.

28671898908 is an abundant number, since it is smaller than the sum of its proper divisors (38229198572).

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

28671898908 is a wasteful number, since it uses less digits than its factorization.

28671898908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389324916 (or 2389324914 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 66.

The spelling of 28671898908 in words is "twenty-eight billion, six hundred seventy-one million, eight hundred ninety-eight thousand, nine hundred eight".