28311359 has 4 divisors (see below), whose sum is σ = 28562016. Its totient is φ = 28060704.

The previous prime is 28311331. The next prime is 28311373. The reversal of 28311359 is 95311382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95311382 = 2 ⋅47655691.

It is a cyclic number.

It is not a de Polignac number, because 28311359 - 2²⁰ = 27262783 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 (28311379) 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, 125159 + ... + 125384.

It is an arithmetic number, because the mean of its divisors is an integer number (7140504).

Almost surely, 2^28311359 is an apocalyptic number.

28311359 is a deficient number, since it is larger than the sum of its proper divisors (250657).

28311359 is a wasteful number, since it uses less digits than its factorization.

28311359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250656.

The product of its digits is 6480, while the sum is 32.

The square root of 28311359 is about 5320.8419446550. The cubic root of 28311359 is about 304.7803094118.

The spelling of 28311359 in words is "twenty-eight million, three hundred eleven thousand, three hundred fifty-nine".