28354697771 has 16 divisors (see below), whose sum is σ = 30619141440. Its totient is φ = 26200298880.

The previous prime is 28354697743. The next prime is 28354697773. The reversal of 28354697771 is 17779645382.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28354697771 - 2¹⁴ = 28354681387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28354697771.

It is not an unprimeable number, because it can be changed into a prime (28354697773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151151 + ... + 282056.

It is an arithmetic number, because the mean of its divisors is an integer number (1913696340).

Almost surely, 2^28354697771 is an apocalyptic number.

28354697771 is a deficient number, since it is larger than the sum of its proper divisors (2264443669).

28354697771 is a wasteful number, since it uses less digits than its factorization.

28354697771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433334.

The product of its digits is 17781120, while the sum is 59.

The spelling of 28354697771 in words is "twenty-eight billion, three hundred fifty-four million, six hundred ninety-seven thousand, seven hundred seventy-one".