28196547 has 4 divisors (see below), whose sum is σ = 37595400. Its totient is φ = 18797696.

The previous prime is 28196543. The next prime is 28196549. The reversal of 28196547 is 74569182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28196547 - 2² = 28196543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28196499 and 28196508.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4699422 + ... + 4699427.

It is an arithmetic number, because the mean of its divisors is an integer number (9398850).

Almost surely, 2^28196547 is an apocalyptic number.

28196547 is a deficient number, since it is larger than the sum of its proper divisors (9398853).

28196547 is an equidigital number, since it uses as much as digits as its factorization.

28196547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9398852.

The product of its digits is 120960, while the sum is 42.

The square root of 28196547 is about 5310.0420902287. The cubic root of 28196547 is about 304.3677559705.

The spelling of 28196547 in words is "twenty-eight million, one hundred ninety-six thousand, five hundred forty-seven".