28311773 has 8 divisors (see below), whose sum is σ = 33400320. Its totient is φ = 23484240.

The previous prime is 28311761. The next prime is 28311779. The reversal of 28311773 is 37711382.

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

It is a cyclic number.

It is not a de Polignac number, because 28311773 - 2⁴ = 28311757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28311779) 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, 65018 + ... + 65451.

It is an arithmetic number, because the mean of its divisors is an integer number (4175040).

Almost surely, 2^28311773 is an apocalyptic number.

It is an amenable number.

28311773 is a deficient number, since it is larger than the sum of its proper divisors (5088547).

28311773 is a wasteful number, since it uses less digits than its factorization.

28311773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130507.

The product of its digits is 7056, while the sum is 32.

The square root of 28311773 is about 5320.8808481303. The cubic root of 28311773 is about 304.7817950161.

The spelling of 28311773 in words is "twenty-eight million, three hundred eleven thousand, seven hundred seventy-three".