28073831 has 2 divisors, whose sum is σ = 28073832. Its totient is φ = 28073830.

The previous prime is 28073819. The next prime is 28073839. The reversal of 28073831 is 13837082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28073831 - 2⁶ = 28073767 is a prime.

It is a super-2 number, since 2×28073831² = 1576279974033122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28073839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036915 + 14036916.

It is an arithmetic number, because the mean of its divisors is an integer number (14036916).

Almost surely, 2^28073831 is an apocalyptic number.

28073831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28073831 is an equidigital number, since it uses as much as digits as its factorization.

28073831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28073831 is about 5298.4744030711. The cubic root of 28073831 is about 303.9255610388.

The spelling of 28073831 in words is "twenty-eight million, seventy-three thousand, eight hundred thirty-one".