28083403 has 4 divisors (see below), whose sum is σ = 28190448. Its totient is φ = 27976360.

The previous prime is 28083379. The next prime is 28083449. The reversal of 28083403 is 30438082.

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 28083403 - 2⁹ = 28082891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28083103) 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, 53128 + ... + 53653.

It is an arithmetic number, because the mean of its divisors is an integer number (7047612).

Almost surely, 2^28083403 is an apocalyptic number.

28083403 is a deficient number, since it is larger than the sum of its proper divisors (107045).

28083403 is a wasteful number, since it uses less digits than its factorization.

28083403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107044.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28083403 is about 5299.3776049646. The cubic root of 28083403 is about 303.9600990741.

The spelling of 28083403 in words is "twenty-eight million, eighty-three thousand, four hundred three".