28033331341381 has 4 divisors (see below), whose sum is σ = 28033854317100. Its totient is φ = 28032808365664.

The previous prime is 28033331341357. The next prime is 28033331341387. The reversal of 28033331341381 is 18314313333082.

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 2971383012900 + 25061948328481 = 1723770^2 + 5006191^2 .

It is a cyclic number.

It is not a de Polignac number, because 28033331341381 - 2²⁹ = 28032794470469 is a prime.

It is a super-2 number, since 2×28033331341381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28033331341387) 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, 261407446 + ... + 261514663.

It is an arithmetic number, because the mean of its divisors is an integer number (7008463579275).

Almost surely, 2^{28033331341381} is an apocalyptic number.

It is an amenable number.

28033331341381 is a deficient number, since it is larger than the sum of its proper divisors (522975719).

28033331341381 is an equidigital number, since it uses as much as digits as its factorization.

28033331341381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522975718.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 28033331341381 in words is "twenty-eight trillion, thirty-three billion, three hundred thirty-one million, three hundred forty-one thousand, three hundred eighty-one".