28136131 has 8 divisors (see below), whose sum is σ = 29771280. Its totient is φ = 26516448.

The previous prime is 28136123. The next prime is 28136137. The reversal of 28136131 is 13163182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28136131 - 2³ = 28136123 is a prime.

It is a super-2 number, since 2×28136131² = 1583283735298322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28136096 and 28136105.

It is not an unprimeable number, because it can be changed into a prime (28136137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (3721410).

Almost surely, 2^28136131 is an apocalyptic number.

28136131 is a deficient number, since it is larger than the sum of its proper divisors (1635149).

28136131 is a wasteful number, since it uses less digits than its factorization.

28136131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733.

The product of its digits is 864, while the sum is 25.

The square root of 28136131 is about 5304.3501958298. The cubic root of 28136131 is about 304.1502135926.

The spelling of 28136131 in words is "twenty-eight million, one hundred thirty-six thousand, one hundred thirty-one".