28041081 has 16 divisors (see below), whose sum is σ = 39329280. Its totient is φ = 17746560.

The previous prime is 28041077. The next prime is 28041113. The reversal of 28041081 is 18014082.

It is not a de Polignac number, because 28041081 - 2² = 28041077 is a prime.

It is a super-2 number, since 2×28041081² = 1572604447297122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28041011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (2458080).

Almost surely, 2^28041081 is an apocalyptic number.

It is an amenable number.

28041081 is a deficient number, since it is larger than the sum of its proper divisors (11288199).

28041081 is a wasteful number, since it uses less digits than its factorization.

28041081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 28041081 is about 5295.3829889820. The cubic root of 28041081 is about 303.8073318935.

The spelling of 28041081 in words is "twenty-eight million, forty-one thousand, eighty-one".