393991130 has 32 divisors (see below), whose sum is σ = 779998464. Its totient is φ = 142376256.

The previous prime is 393991097. The next prime is 393991139. The reversal of 393991130 is 31199393.

It is not an unprimeable number, because it can be changed into a prime (393991139) 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, 26132 + ... + 38351.

It is an arithmetic number, because the mean of its divisors is an integer number (24374952).

Almost surely, 2^393991130 is an apocalyptic number.

393991130 is a deficient number, since it is larger than the sum of its proper divisors (386007334).

393991130 is a wasteful number, since it uses less digits than its factorization.

393991130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64550.

The product of its (nonzero) digits is 19683, while the sum is 38.

The square root of 393991130 is about 19849.2098079495. The cubic root of 393991130 is about 733.0981915984.

The spelling of 393991130 in words is "three hundred ninety-three million, nine hundred ninety-one thousand, one hundred thirty".