28694348988 has 12 divisors (see below), whose sum is σ = 66953481000. Its totient is φ = 9564782992.

The previous prime is 28694348981. The next prime is 28694349017. The reversal of 28694348988 is 88984349682.

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 (28694348981) 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, 1195597863 + ... + 1195597886.

It is an arithmetic number, because the mean of its divisors is an integer number (5579456750).

Almost surely, 2^28694348988 is an apocalyptic number.

It is an amenable number.

28694348988 is an abundant number, since it is smaller than the sum of its proper divisors (38259132012).

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

28694348988 is a wasteful number, since it uses less digits than its factorization.

28694348988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391195756 (or 2391195754 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 69.

The spelling of 28694348988 in words is "twenty-eight billion, six hundred ninety-four million, three hundred forty-eight thousand, nine hundred eighty-eight".