28334131 has 12 divisors (see below), whose sum is σ = 33543952. Its totient is φ = 23444064.

The previous prime is 28334107. The next prime is 28334143. The reversal of 28334131 is 13143382.

It is not a de Polignac number, because 28334131 - 2⁷ = 28334003 is a prime.

It is a super-2 number, since 2×28334131² = 1605645959050322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28334096 and 28334105.

It is not an unprimeable number, because it can be changed into a prime (28334161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3481 + ... + 8293.

Almost surely, 2^28334131 is an apocalyptic number.

28334131 is a deficient number, since it is larger than the sum of its proper divisors (5209821).

28334131 is an equidigital number, since it uses as much as digits as its factorization.

28334131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4878 (or 4849 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 28334131 is about 5322.9814014328. The cubic root of 28334131 is about 304.8620033260.

The spelling of 28334131 in words is "twenty-eight million, three hundred thirty-four thousand, one hundred thirty-one".