28667936860 has 12 divisors (see below), whose sum is σ = 60202667448. Its totient is φ = 11467174736.

The previous prime is 28667936849. The next prime is 28667936879. The reversal of 28667936860 is 6863976682.

It is a congruent number.

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, 716698402 + ... + 716698441.

It is an arithmetic number, because the mean of its divisors is an integer number (5016888954).

Almost surely, 2^28667936860 is an apocalyptic number.

28667936860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28667936860 is an abundant number, since it is smaller than the sum of its proper divisors (31534730588).

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

28667936860 is a wasteful number, since it uses less digits than its factorization.

28667936860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433396852 (or 1433396850 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 28667936860 in words is "twenty-eight billion, six hundred sixty-seven million, nine hundred thirty-six thousand, eight hundred sixty".