406404625 has 16 divisors (see below), whose sum is σ = 553303296. Its totient is φ = 295566000.

The previous prime is 406404589. The next prime is 406404667. The reversal of 406404625 is 526404604.

It is a de Polignac number, because none of the positive numbers 2^k-406404625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146409 + ... + 149158.

It is an arithmetic number, because the mean of its divisors is an integer number (34581456).

Almost surely, 2^406404625 is an apocalyptic number.

It is an amenable number.

406404625 is a deficient number, since it is larger than the sum of its proper divisors (146898671).

406404625 is a wasteful number, since it uses less digits than its factorization.

406404625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295593 (or 295583 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 406404625 is about 20159.4797799943. The cubic root of 406404625 is about 740.7179694813.

The spelling of 406404625 in words is "four hundred six million, four hundred four thousand, six hundred twenty-five".