393286861 has 12 divisors (see below), whose sum is σ = 436477824. Its totient is φ = 351439400.

The previous prime is 393286849. The next prime is 393286919. The reversal of 393286861 is 168682393.

It is not a de Polignac number, because 393286861 - 2²¹ = 391189709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393286561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33156 + ... + 43426.

It is an arithmetic number, because the mean of its divisors is an integer number (36373152).

Almost surely, 2^393286861 is an apocalyptic number.

It is an amenable number.

393286861 is a deficient number, since it is larger than the sum of its proper divisors (43190963).

393286861 is a wasteful number, since it uses less digits than its factorization.

393286861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400 (or 10341 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The square root of 393286861 is about 19831.4613934526. The cubic root of 393286861 is about 732.6611206182.

The spelling of 393286861 in words is "three hundred ninety-three million, two hundred eighty-six thousand, eight hundred sixty-one".