393650440 has 16 divisors (see below), whose sum is σ = 885713580. Its totient is φ = 157460160.

The previous prime is 393650377. The next prime is 393650441. The reversal of 393650440 is 44056393.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 388641796 + 5008644 = 19714^2 + 2238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 393650396 and 393650405.

It is not an unprimeable number, because it can be changed into a prime (393650441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4920591 + ... + 4920670.

Almost surely, 2^393650440 is an apocalyptic number.

It is an amenable number.

393650440 is an abundant number, since it is smaller than the sum of its proper divisors (492063140).

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

393650440 is a wasteful number, since it uses less digits than its factorization.

393650440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9841272 (or 9841268 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 393650440 is about 19840.6259981887. The cubic root of 393650440 is about 732.8868236863.

The spelling of 393650440 in words is "three hundred ninety-three million, six hundred fifty thousand, four hundred forty".