28812685197 has 8 divisors (see below), whose sum is σ = 38417748544. Its totient is φ = 19208039328.

The previous prime is 28812685171. The next prime is 28812685217. The reversal of 28812685197 is 79158621882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28812685197 - 2²⁰ = 28811636621 is a prime.

It is a super-2 number, since 2×28812685197² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812605197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135288 + ... + 275550.

It is an arithmetic number, because the mean of its divisors is an integer number (4802218568).

Almost surely, 2^28812685197 is an apocalyptic number.

It is an amenable number.

28812685197 is a deficient number, since it is larger than the sum of its proper divisors (9605063347).

28812685197 is a wasteful number, since it uses less digits than its factorization.

28812685197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208739.

The product of its digits is 3870720, while the sum is 57.

The spelling of 28812685197 in words is "twenty-eight billion, eight hundred twelve million, six hundred eighty-five thousand, one hundred ninety-seven".