28067081 has 8 divisors (see below), whose sum is σ = 32529024. Its totient is φ = 23718240.

The previous prime is 28067077. The next prime is 28067087. The reversal of 28067081 is 18076082.

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

It is not a de Polignac number, because 28067081 - 2² = 28067077 is a prime.

It is a super-2 number, since 2×28067081² = 1575522071721122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28067087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27740 + ... + 28733.

It is an arithmetic number, because the mean of its divisors is an integer number (4066128).

Almost surely, 2^28067081 is an apocalyptic number.

It is an amenable number.

28067081 is a deficient number, since it is larger than the sum of its proper divisors (4461943).

28067081 is an equidigital number, since it uses as much as digits as its factorization.

28067081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56551.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 28067081 is about 5297.8373889730. The cubic root of 28067081 is about 303.9012007252.

Subtracting from 28067081 its reverse (18076082), we obtain a palindrome (9990999).

The spelling of 28067081 in words is "twenty-eight million, sixty-seven thousand, eighty-one".