28338081 has 16 divisors (see below), whose sum is σ = 38403456. Its totient is φ = 18585216.

The previous prime is 28338077. The next prime is 28338103. The reversal of 28338081 is 18083382.

It is not a de Polignac number, because 28338081 - 2² = 28338077 is a prime.

It is a super-2 number, since 2×28338081² = 1606093669525122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28338071) 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, 90381 + ... + 90693.

It is an arithmetic number, because the mean of its divisors is an integer number (2400216).

Almost surely, 2^28338081 is an apocalyptic number.

It is an amenable number.

28338081 is a deficient number, since it is larger than the sum of its proper divisors (10065375).

28338081 is a wasteful number, since it uses less digits than its factorization.

28338081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28338081 is about 5323.3524211722. The cubic root of 28338081 is about 304.8761693855.

The spelling of 28338081 in words is "twenty-eight million, three hundred thirty-eight thousand, eighty-one".