28943081 has 8 divisors (see below), whose sum is σ = 29256000. Its totient is φ = 28632240.

The previous prime is 28943069. The next prime is 28943087. The reversal of 28943081 is 18034982.

It is a happy number.

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 28943081 - 2⁶ = 28943017 is a prime.

It is a super-2 number, since 2×28943081² = 1675403875545122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28943087) 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, 48020 + ... + 48618.

It is an arithmetic number, because the mean of its divisors is an integer number (3657000).

Almost surely, 2^28943081 is an apocalyptic number.

It is an amenable number.

28943081 is a deficient number, since it is larger than the sum of its proper divisors (312919).

28943081 is a wasteful number, since it uses less digits than its factorization.

28943081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28943081 is about 5379.8774149603. The cubic root of 28943081 is about 307.0305472403.

The spelling of 28943081 in words is "twenty-eight million, nine hundred forty-three thousand, eighty-one".