28454081 has 2 divisors, whose sum is σ = 28454082. Its totient is φ = 28454080.

The previous prime is 28454071. The next prime is 28454087. The reversal of 28454081 is 18045482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 839056 = 5255^2 + 916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28454081 is a prime.

It is a super-2 number, since 2×28454081² = 1619269451109122, which contains 22 as substring.

It is equal to p_1767920 and since 28454081 and 1767920 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28454087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14227040 + 14227041.

It is an arithmetic number, because the mean of its divisors is an integer number (14227041).

Almost surely, 2^28454081 is an apocalyptic number.

It is an amenable number.

28454081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28454081 is an equidigital number, since it uses as much as digits as its factorization.

28454081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 28454081 is about 5334.2366839127. The cubic root of 28454081 is about 305.2915996504.

The spelling of 28454081 in words is "twenty-eight million, four hundred fifty-four thousand, eighty-one".