3020409 has 30 divisors (see below), whose sum is σ = 5255514. Its totient is φ = 1723680.

The previous prime is 3020401. The next prime is 3020431. The reversal of 3020409 is 9040203.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 1432809 = 1260^2 + 1197^2 .

It is not a de Polignac number, because 3020409 - 2³ = 3020401 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3020391 and 3020400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020401) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3589 + ... + 4349.

Almost surely, 2^3020409 is an apocalyptic number.

It is an amenable number.

3020409 is a deficient number, since it is larger than the sum of its proper divisors (2235105).

3020409 is an equidigital number, since it uses as much as digits as its factorization.

3020409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3020409 is about 1737.9323922408. The cubic root of 3020409 is about 144.5512722989.

The spelling of 3020409 in words is "three million, twenty thousand, four hundred nine".