3966993838 has 8 divisors (see below), whose sum is σ = 5953491432. Its totient is φ = 1982496696.

The previous prime is 3966993799. The next prime is 3966993847. The reversal of 3966993838 is 8383996693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3966993838² = 31474080221459940488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3966993838.

It is a congruent number.

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, 495145 + ... + 503092.

It is an arithmetic number, because the mean of its divisors is an integer number (744186429).

Almost surely, 2^3966993838 is an apocalyptic number.

3966993838 is a deficient number, since it is larger than the sum of its proper divisors (1986497594).

3966993838 is a wasteful number, since it uses less digits than its factorization.

3966993838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000226.

The product of its digits is 45349632, while the sum is 64.

The square root of 3966993838 is about 62984.0760668917. The cubic root of 3966993838 is about 1583.0228193836.

The spelling of 3966993838 in words is "three billion, nine hundred sixty-six million, nine hundred ninety-three thousand, eight hundred thirty-eight".