28409843 has 16 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 21595200.

The previous prime is 28409833. The next prime is 28409861. The reversal of 28409843 is 34890482.

It is not a de Polignac number, because 28409843 - 2⁸ = 28409587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28409797 and 28409806.

It is not an unprimeable number, because it can be changed into a prime (28409813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1343 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (2268000).

Almost surely, 2^28409843 is an apocalyptic number.

28409843 is a deficient number, since it is larger than the sum of its proper divisors (7878157).

28409843 is a wasteful number, since it uses less digits than its factorization.

28409843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28409843 is about 5330.0884608044. The cubic root of 28409843 is about 305.1333037291.

The spelling of 28409843 in words is "twenty-eight million, four hundred nine thousand, eight hundred forty-three".