28488071 has 4 divisors (see below), whose sum is σ = 29182944. Its totient is φ = 27793200.

The previous prime is 28488067. The next prime is 28488127. The reversal of 28488071 is 17088482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28488071 - 2² = 28488067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28488041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347375 + ... + 347456.

It is an arithmetic number, because the mean of its divisors is an integer number (7295736).

Almost surely, 2^28488071 is an apocalyptic number.

28488071 is a deficient number, since it is larger than the sum of its proper divisors (694873).

28488071 is an equidigital number, since it uses as much as digits as its factorization.

28488071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694872.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 28488071 is about 5337.4217558668. The cubic root of 28488071 is about 305.4131139397.

The spelling of 28488071 in words is "twenty-eight million, four hundred eighty-eight thousand, seventy-one".