28416131 has 4 divisors (see below), whose sum is σ = 28427112. Its totient is φ = 28405152.

The previous prime is 28416121. The next prime is 28416133. The reversal of 28416131 is 13161482.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28416131 - 2¹⁴ = 28399747 is a prime.

It is a super-2 number, since 2×28416131² = 1614953002018322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28416131.

It is not an unprimeable number, because it can be changed into a prime (28416133) 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 3 ways as a sum of consecutive naturals, for example, 776 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (7106778).

Almost surely, 2^28416131 is an apocalyptic number.

28416131 is a deficient number, since it is larger than the sum of its proper divisors (10981).

28416131 is an equidigital number, since it uses as much as digits as its factorization.

28416131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980.

The product of its digits is 1152, while the sum is 26.

The square root of 28416131 is about 5330.6782870475. The cubic root of 28416131 is about 305.1558139635.

The spelling of 28416131 in words is "twenty-eight million, four hundred sixteen thousand, one hundred thirty-one".