904828409 has 4 divisors (see below), whose sum is σ = 906918516. Its totient is φ = 902738304.

The previous prime is 904828373. The next prime is 904828411.

It is a happy number.

904828409 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145274809 + 759553600 = 12053^2 + 27560^2 .

It is a cyclic number.

It is not a de Polignac number, because 904828409 - 2⁸ = 904828153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 904828409.

It is not an unprimeable number, because it can be changed into a prime (904828439) 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, 1044404 + ... + 1045269.

It is an arithmetic number, because the mean of its divisors is an integer number (226729629).

Almost surely, 2^904828409 is an apocalyptic number.

It is an amenable number.

904828409 is a deficient number, since it is larger than the sum of its proper divisors (2090107).

904828409 is a wasteful number, since it uses less digits than its factorization.

904828409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090106.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 904828409 is about 30080.3658388657. The cubic root of 904828409 is about 967.2128904344.

The spelling of 904828409 in words is "nine hundred four million, eight hundred twenty-eight thousand, four hundred nine".