28603971 has 12 divisors (see below), whose sum is σ = 45073080. Its totient is φ = 17335680.

The previous prime is 28603963. The next prime is 28603999. The reversal of 28603971 is 17930682.

It is not a de Polignac number, because 28603971 - 2³ = 28603963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28603921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144366 + ... + 144563.

It is an arithmetic number, because the mean of its divisors is an integer number (3756090).

Almost surely, 2^28603971 is an apocalyptic number.

28603971 is a deficient number, since it is larger than the sum of its proper divisors (16469109).

28603971 is a wasteful number, since it uses less digits than its factorization.

28603971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288946 (or 288943 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28603971 is about 5348.2680374117. The cubic root of 28603971 is about 305.8267313319.

Subtracting from 28603971 its reverse (17930682), we obtain a square (10673289 = 3267²).

The spelling of 28603971 in words is "twenty-eight million, six hundred three thousand, nine hundred seventy-one".