393680380 has 24 divisors (see below), whose sum is σ = 870241680. Its totient is φ = 149184000.

The previous prime is 393680347. The next prime is 393680381. The reversal of 393680380 is 83086393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393680381) 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, 517621 + ... + 518380.

It is an arithmetic number, because the mean of its divisors is an integer number (36260070).

Almost surely, 2^393680380 is an apocalyptic number.

It is an amenable number.

393680380 is an abundant number, since it is smaller than the sum of its proper divisors (476561300).

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

393680380 is a wasteful number, since it uses less digits than its factorization.

393680380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036029 (or 1036027 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 393680380 is about 19841.3804963264. The cubic root of 393680380 is about 732.9054036860.

The spelling of 393680380 in words is "three hundred ninety-three million, six hundred eighty thousand, three hundred eighty".