393940164 has 12 divisors (see below), whose sum is σ = 919193744. Its totient is φ = 131313384.

The previous prime is 393940139. The next prime is 393940171. The reversal of 393940164 is 461049393.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16414162 + ... + 16414185.

Almost surely, 2^393940164 is an apocalyptic number.

It is an amenable number.

393940164 is an abundant number, since it is smaller than the sum of its proper divisors (525253580).

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

393940164 is a wasteful number, since it uses less digits than its factorization.

393940164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32828354 (or 32828352 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 393940164 is about 19847.9259369839. The cubic root of 393940164 is about 733.0665794708.

The spelling of 393940164 in words is "three hundred ninety-three million, nine hundred forty thousand, one hundred sixty-four".