28604081 has 16 divisors (see below), whose sum is σ = 33291648. Its totient is φ = 24288000.

The previous prime is 28604077. The next prime is 28604119. The reversal of 28604081 is 18040682.

It is not a de Polignac number, because 28604081 - 2² = 28604077 is a prime.

It is a super-2 number, since 2×28604081² = 1636386899709122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28604011) 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, 27731 + ... + 28743.

It is an arithmetic number, because the mean of its divisors is an integer number (2080728).

Almost surely, 2^28604081 is an apocalyptic number.

It is an amenable number.

28604081 is a deficient number, since it is larger than the sum of its proper divisors (4687567).

28604081 is a wasteful number, since it uses less digits than its factorization.

28604081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28604081 is about 5348.2783211048. The cubic root of 28604081 is about 305.8271233625.

The spelling of 28604081 in words is "twenty-eight million, six hundred four thousand, eighty-one".