28832643 has 12 divisors (see below), whose sum is σ = 47596848. Its totient is φ = 16475760.

The previous prime is 28832627. The next prime is 28832659. The reversal of 28832643 is 34623882.

28832643 is a `hidden beast` number, since 2 + 8 + 8 + 3 + 2 + 643 = 666.

It is an interprime number because it is at equal distance from previous prime (28832627) and next prime (28832659).

It is not a de Polignac number, because 28832643 - 2⁴ = 28832627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28832598 and 28832607.

It is not an unprimeable number, because it can be changed into a prime (28832743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228768 + ... + 228893.

It is an arithmetic number, because the mean of its divisors is an integer number (3966404).

Almost surely, 2^28832643 is an apocalyptic number.

28832643 is a deficient number, since it is larger than the sum of its proper divisors (18764205).

28832643 is a wasteful number, since it uses less digits than its factorization.

28832643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457674 (or 457671 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28832643 is about 5369.6036166555. The cubic root of 28832643 is about 306.6395377440.

It can be divided in two parts, 288326 and 43, that added together give a square (288369 = 537²).

The spelling of 28832643 in words is "twenty-eight million, eight hundred thirty-two thousand, six hundred forty-three".