393142886 has 8 divisors (see below), whose sum is σ = 589971600. Its totient is φ = 196485688.

The previous prime is 393142877. The next prime is 393142909. The reversal of 393142886 is 688241393.

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

It is a super-2 number, since 2×393142886² = 309122657624817992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36986 + ... + 46413.

It is an arithmetic number, because the mean of its divisors is an integer number (73746450).

Almost surely, 2^393142886 is an apocalyptic number.

393142886 is a deficient number, since it is larger than the sum of its proper divisors (196828714).

393142886 is a wasteful number, since it uses less digits than its factorization.

393142886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85758.

The product of its digits is 248832, while the sum is 44.

The square root of 393142886 is about 19827.8310967186. The cubic root of 393142886 is about 732.5717051728.

The spelling of 393142886 in words is "three hundred ninety-three million, one hundred forty-two thousand, eight hundred eighty-six".