3961816 has 16 divisors (see below), whose sum is σ = 7865640. Its totient is φ = 1864320.

The previous prime is 3961813. The next prime is 3961817. The reversal of 3961816 is 6181693.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14430 + ... + 14701.

Almost surely, 2^3961816 is an apocalyptic number.

It is an amenable number.

3961816 is a deficient number, since it is larger than the sum of its proper divisors (3903824).

3961816 is a wasteful number, since it uses less digits than its factorization.

3961816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29154 (or 29150 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 3961816 is about 1990.4311090816. The cubic root of 3961816 is about 158.2333783404.

The spelling of 3961816 in words is "three million, nine hundred sixty-one thousand, eight hundred sixteen".