28025081 has 8 divisors (see below), whose sum is σ = 32133504. Its totient is φ = 23942880.

The previous prime is 28025077. The next prime is 28025083. The reversal of 28025081 is 18052082.

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 28025081 - 2² = 28025077 is a prime.

It is a super-2 number, since 2×28025081² = 1570810330113122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28025081.

It is not an unprimeable number, because it can be changed into a prime (28025083) 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, 4205 + ... + 8586.

It is an arithmetic number, because the mean of its divisors is an integer number (4016688).

Almost surely, 2^28025081 is an apocalyptic number.

It is an amenable number.

28025081 is a deficient number, since it is larger than the sum of its proper divisors (4108423).

28025081 is a wasteful number, since it uses less digits than its factorization.

28025081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28025081 is about 5293.8720233870. The cubic root of 28025081 is about 303.7495376149.

The spelling of 28025081 in words is "twenty-eight million, twenty-five thousand, eighty-one".