3628409 has 4 divisors (see below), whose sum is σ = 3650304. Its totient is φ = 3606516.

The previous prime is 3628403. The next prime is 3628421. The reversal of 3628409 is 9048263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9048263 = 7 ⋅1292609.

It is a cyclic number.

It is not a de Polignac number, because 3628409 - 2⁸ = 3628153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3628403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10697 + ... + 11030.

It is an arithmetic number, because the mean of its divisors is an integer number (912576).

Almost surely, 2^3628409 is an apocalyptic number.

It is an amenable number.

3628409 is a deficient number, since it is larger than the sum of its proper divisors (21895).

3628409 is a wasteful number, since it uses less digits than its factorization.

3628409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21894.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3628409 is about 1904.8383133484. The cubic root of 3628409 is about 153.6639803492.

The spelling of 3628409 in words is "three million, six hundred twenty-eight thousand, four hundred nine".