28410421 has 6 divisors (see below), whose sum is σ = 30764130. Its totient is φ = 26224848.

The previous prime is 28410409. The next prime is 28410443. The reversal of 28410421 is 12401482.

It can be written as a sum of positive squares in 3 ways, for example, as 4056196 + 24354225 = 2014^2 + 4935^2 .

It is not a de Polignac number, because 28410421 - 2⁷ = 28410293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28410392 and 28410401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28410461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83886 + ... + 84223.

It is an arithmetic number, because the mean of its divisors is an integer number (5127355).

Almost surely, 2^28410421 is an apocalyptic number.

It is an amenable number.

28410421 is a deficient number, since it is larger than the sum of its proper divisors (2353709).

28410421 is a wasteful number, since it uses less digits than its factorization.

28410421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168135 (or 168122 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 28410421 is about 5330.1426810171. The cubic root of 28410421 is about 305.1353730336.

The spelling of 28410421 in words is "twenty-eight million, four hundred ten thousand, four hundred twenty-one".