28350331 has 2 divisors, whose sum is σ = 28350332. Its totient is φ = 28350330.

The previous prime is 28350307. The next prime is 28350341. The reversal of 28350331 is 13305382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28350331 is a prime.

It is a super-2 number, since 2×28350331² = 1607482535619122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28350296 and 28350305.

It is not a weakly prime, because it can be changed into another prime (28350341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14175165 + 14175166.

It is an arithmetic number, because the mean of its divisors is an integer number (14175166).

Almost surely, 2^28350331 is an apocalyptic number.

28350331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28350331 is an equidigital number, since it uses as much as digits as its factorization.

28350331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 28350331 is about 5324.5028875943. The cubic root of 28350331 is about 304.9200937319.

The spelling of 28350331 in words is "twenty-eight million, three hundred fifty thousand, three hundred thirty-one".