28083643 has 8 divisors (see below), whose sum is σ = 33983712. Its totient is φ = 22655616.

The previous prime is 28083641. The next prime is 28083673. The reversal of 28083643 is 34638082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28083643 - 2¹ = 28083641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28083599 and 28083608.

It is not an unprimeable number, because it can be changed into a prime (28083641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117880 + ... + 118117.

It is an arithmetic number, because the mean of its divisors is an integer number (4247964).

Almost surely, 2^28083643 is an apocalyptic number.

28083643 is a deficient number, since it is larger than the sum of its proper divisors (5900069).

28083643 is a wasteful number, since it uses less digits than its factorization.

28083643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236021.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 28083643 is about 5299.4002490848. The cubic root of 28083643 is about 303.9609649498.

The spelling of 28083643 in words is "twenty-eight million, eighty-three thousand, six hundred forty-three".