28942031 has 2 divisors, whose sum is σ = 28942032. Its totient is φ = 28942030.

The previous prime is 28942021. The next prime is 28942033. The reversal of 28942031 is 13024982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28942031 - 2¹⁰ = 28941007 is a prime.

It is a super-2 number, since 2×28942031² = 1675282316809922, which contains 22 as substring.

Together with 28942033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28941985 and 28942003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28942033) 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, 14471015 + 14471016.

It is an arithmetic number, because the mean of its divisors is an integer number (14471016).

Almost surely, 2^28942031 is an apocalyptic number.

28942031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28942031 is an equidigital number, since it uses as much as digits as its factorization.

28942031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28942031 is about 5379.7798282086. The cubic root of 28942031 is about 307.0268343671.

The spelling of 28942031 in words is "twenty-eight million, nine hundred forty-two thousand, thirty-one".