28001732 has 12 divisors (see below), whose sum is σ = 53457936. Its totient is φ = 12728040.

The previous prime is 28001731. The next prime is 28001747. The reversal of 28001732 is 23710082.

It is a junction number, because it is equal to n+sod(n) for n = 28001698 and 28001707.

It is not an unprimeable number, because it can be changed into a prime (28001731) 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, 318158 + ... + 318245.

It is an arithmetic number, because the mean of its divisors is an integer number (4454828).

Almost surely, 2^28001732 is an apocalyptic number.

28001732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28001732 is a deficient number, since it is larger than the sum of its proper divisors (25456204).

28001732 is a wasteful number, since it uses less digits than its factorization.

28001732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636418 (or 636416 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 28001732 is about 5291.6662782152. Note that the first 3 decimals coincide. The cubic root of 28001732 is about 303.6651582157.

The spelling of 28001732 in words is "twenty-eight million, one thousand, seven hundred thirty-two".