28073671 has 4 divisors (see below), whose sum is σ = 28411992. Its totient is φ = 27735352.

The previous prime is 28073651. The next prime is 28073687. The reversal of 28073671 is 17637082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17637082 = 2 ⋅8818541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28073671 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 (28073651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169036 + ... + 169201.

It is an arithmetic number, because the mean of its divisors is an integer number (7102998).

Almost surely, 2^28073671 is an apocalyptic number.

28073671 is a deficient number, since it is larger than the sum of its proper divisors (338321).

28073671 is an equidigital number, since it uses as much as digits as its factorization.

28073671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338320.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 28073671 is about 5298.4593043639. The cubic root of 28073671 is about 303.9249836543.

The spelling of 28073671 in words is "twenty-eight million, seventy-three thousand, six hundred seventy-one".