393415985 has 8 divisors (see below), whose sum is σ = 474996480. Its totient is φ = 312801264.

The previous prime is 393415961. The next prime is 393415993. The reversal of 393415985 is 589514393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 393415985 - 2²⁸ = 124980529 is a prime.

It is a super-2 number, since 2×393415985² = 309552274507040450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240545 + ... + 242174.

It is an arithmetic number, because the mean of its divisors is an integer number (59374560).

Almost surely, 2^393415985 is an apocalyptic number.

It is an amenable number.

393415985 is a deficient number, since it is larger than the sum of its proper divisors (81580495).

393415985 is a wasteful number, since it uses less digits than its factorization.

393415985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482887.

The product of its digits is 583200, while the sum is 47.

The square root of 393415985 is about 19834.7166604416. The cubic root of 393415985 is about 732.7412943135.

The spelling of 393415985 in words is "three hundred ninety-three million, four hundred fifteen thousand, nine hundred eighty-five".