28297983 has 16 divisors (see below), whose sum is σ = 43384320. Its totient is φ = 16071456.

The previous prime is 28297963. The next prime is 28298021. The reversal of 28297983 is 38979282.

It is a happy number.

It is not a de Polignac number, because 28297983 - 2⁸ = 28297727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (2711520).

Almost surely, 2^28297983 is an apocalyptic number.

28297983 is a deficient number, since it is larger than the sum of its proper divisors (15086337).

28297983 is a wasteful number, since it uses less digits than its factorization.

28297983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246.

The product of its digits is 435456, while the sum is 48.

The square root of 28297983 is about 5319.5848522230. The cubic root of 28297983 is about 304.7323029606.

The spelling of 28297983 in words is "twenty-eight million, two hundred ninety-seven thousand, nine hundred eighty-three".