28767831697 has 8 divisors (see below), whose sum is σ = 31384366272. Its totient is φ = 26151510000.

The previous prime is 28767831641. The next prime is 28767831707. The reversal of 28767831697 is 79613876782.

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

It is a de Polignac number, because none of the positive numbers 2^k-28767831697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28767831797) 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, 389548 + ... + 457474.

It is an arithmetic number, because the mean of its divisors is an integer number (3923045784).

Almost surely, 2^28767831697 is an apocalyptic number.

It is an amenable number.

28767831697 is a deficient number, since it is larger than the sum of its proper divisors (2616534575).

28767831697 is a wasteful number, since it uses less digits than its factorization.

28767831697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106439.

The product of its digits is 42674688, while the sum is 64.

The spelling of 28767831697 in words is "twenty-eight billion, seven hundred sixty-seven million, eight hundred thirty-one thousand, six hundred ninety-seven".