28368071 has 4 divisors (see below), whose sum is σ = 28382112. Its totient is φ = 28354032.

The previous prime is 28368037. The next prime is 28368077. The reversal of 28368071 is 17086382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17086382 = 2 ⋅8543191.

It is a cyclic number.

It is not a de Polignac number, because 28368071 - 2²² = 24173767 is a prime.

It is a super-2 number, since 2×28368071² = 1609494904522082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28368077) 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, 3350 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (7095528).

Almost surely, 2^28368071 is an apocalyptic number.

28368071 is a deficient number, since it is larger than the sum of its proper divisors (14041).

28368071 is a wasteful number, since it uses less digits than its factorization.

28368071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14040.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28368071 is about 5326.1685102895. The cubic root of 28368071 is about 304.9836809328.

The spelling of 28368071 in words is "twenty-eight million, three hundred sixty-eight thousand, seventy-one".