28423695673 has 4 divisors (see below), whose sum is σ = 29403823140. Its totient is φ = 27443568208.

The previous prime is 28423695653. The next prime is 28423695689. The reversal of 28423695673 is 37659632482.

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 7134843024 + 21288852649 = 84468^2 + 145907^2 .

It is a cyclic number.

It is not a de Polignac number, because 28423695673 - 2³³ = 19833761081 is a prime.

It is a super-2 number, since 2×28423695673² (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 (28423695653) 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, 490063690 + ... + 490063747.

It is an arithmetic number, because the mean of its divisors is an integer number (7350955785).

Almost surely, 2^28423695673 is an apocalyptic number.

It is an amenable number.

28423695673 is a deficient number, since it is larger than the sum of its proper divisors (980127467).

28423695673 is an equidigital number, since it uses as much as digits as its factorization.

28423695673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980127466.

The product of its digits is 13063680, while the sum is 55.

The spelling of 28423695673 in words is "twenty-eight billion, four hundred twenty-three million, six hundred ninety-five thousand, six hundred seventy-three".