393676628 has 12 divisors (see below), whose sum is σ = 689074260. Its totient is φ = 196798272.

The previous prime is 393676627. The next prime is 393676631. The reversal of 393676628 is 826676393.

It can be written as a sum of positive squares in 2 ways, for example, as 140612164 + 253064464 = 11858^2 + 15908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393676627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29000 + ... + 40352.

It is an arithmetic number, because the mean of its divisors is an integer number (57422855).

Almost surely, 2^393676628 is an apocalyptic number.

It is an amenable number.

393676628 is a deficient number, since it is larger than the sum of its proper divisors (295397632).

393676628 is a wasteful number, since it uses less digits than its factorization.

393676628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20026 (or 20024 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The square root of 393676628 is about 19841.2859462284. The cubic root of 393676628 is about 732.9030753422.

The spelling of 393676628 in words is "three hundred ninety-three million, six hundred seventy-six thousand, six hundred twenty-eight".