28803181 has 8 divisors (see below), whose sum is σ = 31460544. Its totient is φ = 26152320.

The previous prime is 28803169. The next prime is 28803193. The reversal of 28803181 is 18130882.

It is an interprime number because it is at equal distance from previous prime (28803169) and next prime (28803193).

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 28803181 - 2⁵ = 28803149 is a prime.

It is a super-2 number, since 2×28803181² = 1659246471437522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28803161) 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, 16125 + ... + 17821.

It is an arithmetic number, because the mean of its divisors is an integer number (3932568).

Almost surely, 2^28803181 is an apocalyptic number.

It is an amenable number.

28803181 is a deficient number, since it is larger than the sum of its proper divisors (2657363).

28803181 is a wasteful number, since it uses less digits than its factorization.

28803181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 28803181 is about 5366.8595099928. The cubic root of 28803181 is about 306.5350578674.

The spelling of 28803181 in words is "twenty-eight million, eight hundred three thousand, one hundred eighty-one".