393681342 has 16 divisors (see below), whose sum is σ = 833678352. Its totient is φ = 123507840.

The previous prime is 393681341. The next prime is 393681371. The reversal of 393681342 is 243186393.

It is a super-3 number, since 3×393681342³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 393681342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393681341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1929709 + ... + 1929912.

It is an arithmetic number, because the mean of its divisors is an integer number (52104897).

Almost surely, 2^393681342 is an apocalyptic number.

393681342 is an abundant number, since it is smaller than the sum of its proper divisors (439997010).

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

393681342 is a wasteful number, since it uses less digits than its factorization.

393681342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859643.

The product of its digits is 93312, while the sum is 39.

The square root of 393681342 is about 19841.4047385763. The cubic root of 393681342 is about 732.9060006630.

The spelling of 393681342 in words is "three hundred ninety-three million, six hundred eighty-one thousand, three hundred forty-two".