3993394968 has 24 divisors (see below), whose sum is σ = 10815444900. Its totient is φ = 1331131632.

The previous prime is 3993394963. The next prime is 3993394981. The reversal of 3993394968 is 8694933993.

3993394968 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993394963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27731838 + ... + 27731981.

Almost surely, 2^3993394968 is an apocalyptic number.

It is an amenable number.

3993394968 is an abundant number, since it is smaller than the sum of its proper divisors (6822049932).

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

3993394968 is a wasteful number, since it uses less digits than its factorization.

3993394968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55463831 (or 55463824 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 63.

The square root of 3993394968 is about 63193.3142666216. The cubic root of 3993394968 is about 1586.5268343765.

The spelling of 3993394968 in words is "three billion, nine hundred ninety-three million, three hundred ninety-four thousand, nine hundred sixty-eight".