28029081 has 8 divisors (see below), whose sum is σ = 37735360. Its totient is φ = 18504432.

The previous prime is 28029049. The next prime is 28029097. The reversal of 28029081 is 18092082.

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

It is not a de Polignac number, because 28029081 - 2⁵ = 28029049 is a prime.

It is a super-2 number, since 2×28029081² = 1571258763409122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28029041) 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, 45046 + ... + 45663.

It is an arithmetic number, because the mean of its divisors is an integer number (4716920).

Almost surely, 2^28029081 is an apocalyptic number.

It is an amenable number.

28029081 is a deficient number, since it is larger than the sum of its proper divisors (9706279).

28029081 is a wasteful number, since it uses less digits than its factorization.

28029081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90815.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 28029081 is about 5294.2498052132. The cubic root of 28029081 is about 303.7639882464.

The spelling of 28029081 in words is "twenty-eight million, twenty-nine thousand, eighty-one".