393991014 has 32 divisors (see below), whose sum is σ = 835236576. Its totient is φ = 123471360.

The previous prime is 393991007. The next prime is 393991027. The reversal of 393991014 is 410199393.

It is a super-2 number, since 2×393991014² = 310457838225496392, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139464 + ... + 142260.

It is an arithmetic number, because the mean of its divisors is an integer number (26101143).

Almost surely, 2^393991014 is an apocalyptic number.

393991014 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

393991014 is an abundant number, since it is smaller than the sum of its proper divisors (441245562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

393991014 is a wasteful number, since it uses less digits than its factorization.

393991014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 393991014 is about 19849.2068859186. The cubic root of 393991014 is about 733.0981196515.

The spelling of 393991014 in words is "three hundred ninety-three million, nine hundred ninety-one thousand, fourteen".