28828943 has 12 divisors (see below), whose sum is σ = 33944568. Its totient is φ = 24138240.

The previous prime is 28828937. The next prime is 28828997. The reversal of 28828943 is 34982882.

It is not a de Polignac number, because 28828943 - 2¹⁴ = 28812559 is a prime.

It is a super-2 number, since 2×28828943² = 1662215908994498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28828894 and 28828903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24828943) 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, 63983 + ... + 64431.

It is an arithmetic number, because the mean of its divisors is an integer number (2828714).

Almost surely, 2^28828943 is an apocalyptic number.

28828943 is a deficient number, since it is larger than the sum of its proper divisors (5115625).

28828943 is an equidigital number, since it uses as much as digits as its factorization.

28828943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922 (or 473 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 28828943 is about 5369.2590736525. The cubic root of 28828943 is about 306.6264204956.

The spelling of 28828943 in words is "twenty-eight million, eight hundred twenty-eight thousand, nine hundred forty-three".