28886401 has 2 divisors, whose sum is σ = 28886402. Its totient is φ = 28886400.

The previous prime is 28886393. The next prime is 28886419. The reversal of 28886401 is 10468882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22810176 + 6076225 = 4776^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 28886401 - 2³ = 28886393 is a prime.

It is not a weakly prime, because it can be changed into another prime (28887401) 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, 14443200 + 14443201.

It is an arithmetic number, because the mean of its divisors is an integer number (14443201).

Almost surely, 2^28886401 is an apocalyptic number.

It is an amenable number.

28886401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28886401 is an equidigital number, since it uses as much as digits as its factorization.

28886401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 28886401 is about 5374.6070554041. The cubic root of 28886401 is about 306.8299942571.

The spelling of 28886401 in words is "twenty-eight million, eight hundred eighty-six thousand, four hundred one".