28804031 has 2 divisors, whose sum is σ = 28804032. Its totient is φ = 28804030.

The previous prime is 28803979. The next prime is 28804033. The reversal of 28804031 is 13040882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28804031 is a prime.

It is a super-2 number, since 2×28804031² = 1659344403697922, which contains 22 as substring.

Together with 28804033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28804033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14402015 + 14402016.

It is an arithmetic number, because the mean of its divisors is an integer number (14402016).

Almost surely, 2^28804031 is an apocalyptic number.

28804031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28804031 is an equidigital number, since it uses as much as digits as its factorization.

28804031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28804031 is about 5366.9386991096. The cubic root of 28804031 is about 306.5380731853.

The spelling of 28804031 in words is "twenty-eight million, eight hundred four thousand, thirty-one".