28697144069 has 8 divisors (see below), whose sum is σ = 31657728960. Its totient is φ = 25795184800.

The previous prime is 28697144053. The next prime is 28697144071. The reversal of 28697144069 is 96044179682.

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

It is not a de Polignac number, because 28697144069 - 2⁴ = 28697144053 is a prime.

It is a super-2 number, since 2×28697144069² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28697144269) 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, 14655377 + ... + 14657334.

It is an arithmetic number, because the mean of its divisors is an integer number (3957216120).

Almost surely, 2^28697144069 is an apocalyptic number.

It is an amenable number.

28697144069 is a deficient number, since it is larger than the sum of its proper divisors (2960584891).

28697144069 is a wasteful number, since it uses less digits than its factorization.

28697144069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29312811.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 28697144069 in words is "twenty-eight billion, six hundred ninety-seven million, one hundred forty-four thousand, sixty-nine".