28123983 has 16 divisors (see below), whose sum is σ = 41747040. Its totient is φ = 18712512.

The previous prime is 28123937. The next prime is 28123993. The reversal of 28123983 is 38932182.

It is a happy number.

It is not a de Polignac number, because 28123983 - 2¹⁶ = 28058447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28123993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25185 + ... + 26277.

It is an arithmetic number, because the mean of its divisors is an integer number (2609190).

Almost surely, 2^28123983 is an apocalyptic number.

28123983 is a deficient number, since it is larger than the sum of its proper divisors (13623057).

28123983 is a wasteful number, since it uses less digits than its factorization.

28123983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2049 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 28123983 is about 5303.2049743528. The cubic root of 28123983 is about 304.1064341941.

The spelling of 28123983 in words is "twenty-eight million, one hundred twenty-three thousand, nine hundred eighty-three".