28331877353 has 4 divisors (see below), whose sum is σ = 30511252548. Its totient is φ = 26152502160.

The previous prime is 28331877317. The next prime is 28331877373. The reversal of 28331877353 is 35377813382.

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 3937186009 + 24394691344 = 62747^2 + 156188^2 .

It is a cyclic number.

It is not a de Polignac number, because 28331877353 - 2²⁶ = 28264768489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28331877373) 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, 1089687578 + ... + 1089687603.

It is an arithmetic number, because the mean of its divisors is an integer number (7627813137).

Almost surely, 2^28331877353 is an apocalyptic number.

It is an amenable number.

28331877353 is a deficient number, since it is larger than the sum of its proper divisors (2179375195).

28331877353 is a wasteful number, since it uses less digits than its factorization.

28331877353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179375194.

The product of its digits is 2540160, while the sum is 50.

The spelling of 28331877353 in words is "twenty-eight billion, three hundred thirty-one million, eight hundred seventy-seven thousand, three hundred fifty-three".