28196541 has 12 divisors (see below), whose sum is σ = 40909180. Its totient is φ = 18714240.

The previous prime is 28196537. The next prime is 28196543. The reversal of 28196541 is 14569182.

28196541 is a `hidden beast` number, since 28 + 1 + 96 + 541 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26316900 + 1879641 = 5130^2 + 1371^2 .

It is not a de Polignac number, because 28196541 - 2² = 28196537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28196496 and 28196505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28196543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4780 + ... + 8901.

Almost surely, 2^28196541 is an apocalyptic number.

It is an amenable number.

28196541 is a deficient number, since it is larger than the sum of its proper divisors (12712639).

28196541 is a wasteful number, since it uses less digits than its factorization.

28196541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13916 (or 13913 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 28196541 is about 5310.0415252614. The cubic root of 28196541 is about 304.3677343815.

The spelling of 28196541 in words is "twenty-eight million, one hundred ninety-six thousand, five hundred forty-one".