7028409 has 16 divisors (see below), whose sum is σ = 10046592. Its totient is φ = 4359168.

The previous prime is 7028407. The next prime is 7028431. The reversal of 7028409 is 9048207.

It is not a de Polignac number, because 7028409 - 2¹ = 7028407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7028401) 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, 1177 + ... + 3929.

It is an arithmetic number, because the mean of its divisors is an integer number (627912).

Almost surely, 2^7028409 is an apocalyptic number.

It is an amenable number.

7028409 is a deficient number, since it is larger than the sum of its proper divisors (3018183).

7028409 is a wasteful number, since it uses less digits than its factorization.

7028409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7028409 is about 2651.1146712279. The cubic root of 7028409 is about 191.5515521324.

The spelling of 7028409 in words is "seven million, twenty-eight thousand, four hundred nine".