3933401816 has 8 divisors (see below), whose sum is σ = 7375128420. Its totient is φ = 1966700904.

The previous prime is 3933401803. The next prime is 3933401821. The reversal of 3933401816 is 6181043393.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3933401816² = 30943299692224195712, 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 3933401816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245837606 + ... + 245837621.

Almost surely, 2^3933401816 is an apocalyptic number.

It is an amenable number.

3933401816 is a deficient number, since it is larger than the sum of its proper divisors (3441726604).

3933401816 is a wasteful number, since it uses less digits than its factorization.

3933401816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491675233 (or 491675229 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3933401816 is about 62716.8383769463. The cubic root of 3933401816 is about 1578.5418657698.

The spelling of 3933401816 in words is "three billion, nine hundred thirty-three million, four hundred one thousand, eight hundred sixteen".