28323539 has 2 divisors, whose sum is σ = 28323540. Its totient is φ = 28323538.

The previous prime is 28323499. The next prime is 28323551. The reversal of 28323539 is 93532382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28323539 is a prime.

It is a super-2 number, since 2×28323539² = 1604445722969042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28323499 and 28323508.

It is not a weakly prime, because it can be changed into another prime (28323439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14161769 + 14161770.

It is an arithmetic number, because the mean of its divisors is an integer number (14161770).

Almost surely, 2^28323539 is an apocalyptic number.

28323539 is a deficient number, since it is larger than the sum of its proper divisors (1).

28323539 is an equidigital number, since it uses as much as digits as its factorization.

28323539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 28323539 is about 5321.9863772843. The cubic root of 28323539 is about 304.8240102686.

The spelling of 28323539 in words is "twenty-eight million, three hundred twenty-three thousand, five hundred thirty-nine".