405580385 has 16 divisors (see below), whose sum is σ = 556574976. Its totient is φ = 277937088.

The previous prime is 405580381. The next prime is 405580393. The reversal of 405580385 is 583085504.

It is a cyclic number.

It is not a de Polignac number, because 405580385 - 2² = 405580381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405580381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79172 + ... + 84138.

It is an arithmetic number, because the mean of its divisors is an integer number (34785936).

Almost surely, 2^405580385 is an apocalyptic number.

It is an amenable number.

405580385 is a deficient number, since it is larger than the sum of its proper divisors (150994591).

405580385 is a wasteful number, since it uses less digits than its factorization.

405580385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312.

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 405580385 is about 20139.0264163887. The cubic root of 405580385 is about 740.2168739795.

The spelling of 405580385 in words is "four hundred five million, five hundred eighty thousand, three hundred eighty-five".