28301809331 has 2 divisors, whose sum is σ = 28301809332. Its totient is φ = 28301809330.

The previous prime is 28301809301. The next prime is 28301809409. The reversal of 28301809331 is 13390810382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28301809331 - 2⁶ = 28301809267 is a prime.

It is a super-2 number, since 2×28301809331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28301809301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14150904665 + 14150904666.

It is an arithmetic number, because the mean of its divisors is an integer number (14150904666).

Almost surely, 2^28301809331 is an apocalyptic number.

28301809331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28301809331 is an equidigital number, since it uses as much as digits as its factorization.

28301809331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 28301809331 in words is "twenty-eight billion, three hundred one million, eight hundred nine thousand, three hundred thirty-one".