28843929 has 12 divisors (see below), whose sum is σ = 41710500. Its totient is φ = 19207584.

The previous prime is 28843901. The next prime is 28843931. The reversal of 28843929 is 92934882.

It can be written as a sum of positive squares in 2 ways, for example, as 6969600 + 21874329 = 2640^2 + 4677^2 .

It is not a de Polignac number, because 28843929 - 2²¹ = 26746777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28843939) 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, 12907 + ... + 14975.

It is an arithmetic number, because the mean of its divisors is an integer number (3475875).

Almost surely, 2^28843929 is an apocalyptic number.

It is an amenable number.

28843929 is a deficient number, since it is larger than the sum of its proper divisors (12866571).

28843929 is a wasteful number, since it uses less digits than its factorization.

28843929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624 (or 3621 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28843929 is about 5370.6544293968. The cubic root of 28843929 is about 306.6795419663.

The spelling of 28843929 in words is "twenty-eight million, eight hundred forty-three thousand, nine hundred twenty-nine".