318400385 has 16 divisors (see below), whose sum is σ = 419679360. Its totient is φ = 230820480.

The previous prime is 318400373. The next prime is 318400409. The reversal of 318400385 is 583004813.

It is a happy number.

It is not a de Polignac number, because 318400385 - 2⁶ = 318400321 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70676 + ... + 75045.

It is an arithmetic number, because the mean of its divisors is an integer number (26229960).

Almost surely, 2^318400385 is an apocalyptic number.

It is an amenable number.

318400385 is a deficient number, since it is larger than the sum of its proper divisors (101278975).

318400385 is a wasteful number, since it uses less digits than its factorization.

318400385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145768.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 318400385 is about 17843.7772066343. Note that the first 3 decimals coincide. The cubic root of 318400385 is about 682.8487646643.

The spelling of 318400385 in words is "three hundred eighteen million, four hundred thousand, three hundred eighty-five".