28333873 has 2 divisors, whose sum is σ = 28333874. Its totient is φ = 28333872.

The previous prime is 28333871. The next prime is 28333889. The reversal of 28333873 is 37833382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25735329 + 2598544 = 5073^2 + 1612^2 .

It is a cyclic number.

It is not a de Polignac number, because 28333873 - 2¹ = 28333871 is a prime.

Together with 28333871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28333871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14166936 + 14166937.

It is an arithmetic number, because the mean of its divisors is an integer number (14166937).

Almost surely, 2^28333873 is an apocalyptic number.

It is an amenable number.

28333873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28333873 is an equidigital number, since it uses as much as digits as its factorization.

28333873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 37.

The square root of 28333873 is about 5322.9571668387. The cubic root of 28333873 is about 304.8610780034.

It can be divided in two parts, 2833387 and 3, that added together give a triangular number (2833390 = T₂₃₈₀).

The spelling of 28333873 in words is "twenty-eight million, three hundred thirty-three thousand, eight hundred seventy-three".