28182031 has 2 divisors, whose sum is σ = 28182032. Its totient is φ = 28182030.

The previous prime is 28182019. The next prime is 28182083. The reversal of 28182031 is 13028182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28182031 - 2¹⁹ = 27657743 is a prime.

It is a super-2 number, since 2×28182031² = 1588453742569922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28181987 and 28182005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28182431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14091015 + 14091016.

It is an arithmetic number, because the mean of its divisors is an integer number (14091016).

Almost surely, 2^28182031 is an apocalyptic number.

28182031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28182031 is an equidigital number, since it uses as much as digits as its factorization.

28182031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28182031 is about 5308.6750701093. The cubic root of 28182031 is about 304.3155159953.

The spelling of 28182031 in words is "twenty-eight million, one hundred eighty-two thousand, thirty-one".