393860 has 24 divisors (see below), whose sum is σ = 846720. Its totient is φ = 153824.

The previous prime is 393859. The next prime is 393863. The reversal of 393860 is 68393.

It is a super-3 number, since 3×393860³ = 183293424133368000, which contains 333 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (393863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2³⁹³⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

393860 is an abundant number, since it is smaller than the sum of its proper divisors (452860).

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

393860 is a wasteful number, since it uses less digits than its factorization.

393860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 393860 is about 627.5826638778. The cubic root of 393860 is about 73.3016851499.

The spelling of 393860 in words is "three hundred ninety-three thousand, eight hundred sixty".