393393340 has 12 divisors (see below), whose sum is σ = 826126056. Its totient is φ = 157357328.

The previous prime is 393393313. The next prime is 393393353. The reversal of 393393340 is 43393393.

It is a self number, because there is not a number n which added to its sum of digits gives 393393340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9834814 + ... + 9834853.

It is an arithmetic number, because the mean of its divisors is an integer number (68843838).

Almost surely, 2^393393340 is an apocalyptic number.

It is an amenable number.

393393340 is an abundant number, since it is smaller than the sum of its proper divisors (432732716).

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

393393340 is a wasteful number, since it uses less digits than its factorization.

393393340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19669676 (or 19669674 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 37.

The square root of 393393340 is about 19834.1458096889. The cubic root of 393393340 is about 732.7272351958.

The spelling of 393393340 in words is "three hundred ninety-three million, three hundred ninety-three thousand, three hundred forty".