28167081 has 8 divisors (see below), whose sum is σ = 37595520. Its totient is φ = 18758352.

The previous prime is 28167077. The next prime is 28167089. The reversal of 28167081 is 18076182.

It is a happy number.

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

It is not a de Polignac number, because 28167081 - 2² = 28167077 is a prime.

It is a super-2 number, since 2×28167081² = 1586768904121122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28167089) 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, 1185 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (4699440).

Almost surely, 2^28167081 is an apocalyptic number.

It is an amenable number.

28167081 is a deficient number, since it is larger than the sum of its proper divisors (9428439).

28167081 is a wasteful number, since it uses less digits than its factorization.

28167081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9855.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28167081 is about 5307.2668107040. The cubic root of 28167081 is about 304.2616953927.

The spelling of 28167081 in words is "twenty-eight million, one hundred sixty-seven thousand, eighty-one".