28163541 has 8 divisors (see below), whose sum is σ = 42915904. Its totient is φ = 16093440.

The previous prime is 28163537. The next prime is 28163557. The reversal of 28163541 is 14536182.

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

It is not a de Polignac number, because 28163541 - 2² = 28163537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28163499 and 28163508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163041) 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 7 ways as a sum of consecutive naturals, for example, 670540 + ... + 670581.

It is an arithmetic number, because the mean of its divisors is an integer number (5364488).

Almost surely, 2^28163541 is an apocalyptic number.

28163541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28163541 is a deficient number, since it is larger than the sum of its proper divisors (14752363).

28163541 is a wasteful number, since it uses less digits than its factorization.

28163541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341131.

The product of its digits is 5760, while the sum is 30.

The square root of 28163541 is about 5306.9332952280. The cubic root of 28163541 is about 304.2489484615.

The spelling of 28163541 in words is "twenty-eight million, one hundred sixty-three thousand, five hundred forty-one".