28832081 has 4 divisors (see below), whose sum is σ = 28849392. Its totient is φ = 28814772.

The previous prime is 28832071. The next prime is 28832107. The reversal of 28832081 is 18023882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28832081 is a prime.

It is a super-2 number, since 2×28832081² = 1662577789581122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28832071) 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, 5855 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (7212348).

Almost surely, 2^28832081 is an apocalyptic number.

It is an amenable number.

28832081 is a deficient number, since it is larger than the sum of its proper divisors (17311).

28832081 is a wasteful number, since it uses less digits than its factorization.

28832081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17310.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 28832081 is about 5369.5512847909. The cubic root of 28832081 is about 306.6375454126.

The spelling of 28832081 in words is "twenty-eight million, eight hundred thirty-two thousand, eighty-one".