28357107769 has 4 divisors (see below), whose sum is σ = 28374602980. Its totient is φ = 28339612560.

The previous prime is 28357107689. The next prime is 28357107781. The reversal of 28357107769 is 96770175382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17361488169 + 10995619600 = 131763^2 + 104860^2 .

It is a cyclic number.

It is not a de Polignac number, because 28357107769 - 2¹⁵ = 28357075001 is a prime.

It is a super-2 number, since 2×28357107769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28357107799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8745174 + ... + 8748415.

It is an arithmetic number, because the mean of its divisors is an integer number (7093650745).

Almost surely, 2^28357107769 is an apocalyptic number.

It is an amenable number.

28357107769 is a deficient number, since it is larger than the sum of its proper divisors (17495211).

28357107769 is a wasteful number, since it uses less digits than its factorization.

28357107769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495210.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 28357107769 in words is "twenty-eight billion, three hundred fifty-seven million, one hundred seven thousand, seven hundred sixty-nine".