393868036 has 12 divisors (see below), whose sum is σ = 729814428. Its totient is φ = 185349632.

The previous prime is 393867979. The next prime is 393868049. The reversal of 393868036 is 630868393.

It can be written as a sum of positive squares in 2 ways, for example, as 167184900 + 226683136 = 12930^2 + 15056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2896021 + ... + 2896156.

It is an arithmetic number, because the mean of its divisors is an integer number (60817869).

Almost surely, 2^393868036 is an apocalyptic number.

It is an amenable number.

393868036 is a deficient number, since it is larger than the sum of its proper divisors (335946392).

393868036 is a wasteful number, since it uses less digits than its factorization.

393868036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792198 (or 5792196 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 393868036 is about 19846.1088377546. The cubic root of 393868036 is about 733.0218367591.

The spelling of 393868036 in words is "three hundred ninety-three million, eight hundred sixty-eight thousand, thirty-six".