404000825 has 6 divisors (see below), whose sum is σ = 500961054. Its totient is φ = 323200640.

The previous prime is 404000809. The next prime is 404000851. The reversal of 404000825 is 528000404.

It can be written as a sum of positive squares in 3 ways, for example, as 7513081 + 396487744 = 2741^2 + 19912^2 .

It is not a de Polignac number, because 404000825 - 2⁴ = 404000809 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 404000825.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8079992 + ... + 8080041.

It is an arithmetic number, because the mean of its divisors is an integer number (83493509).

Almost surely, 2^404000825 is an apocalyptic number.

It is an amenable number.

404000825 is a deficient number, since it is larger than the sum of its proper divisors (96960229).

404000825 is a wasteful number, since it uses less digits than its factorization.

404000825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16160043 (or 16160038 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 404000825 is about 20099.7717648734. The cubic root of 404000825 is about 739.2546823762.

The spelling of 404000825 in words is "four hundred four million, eight hundred twenty-five", and thus it is an aban number.