3937816 has 8 divisors (see below), whose sum is σ = 7383420. Its totient is φ = 1968904.

The previous prime is 3937789. The next prime is 3937819. The reversal of 3937816 is 6187393.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246106 + ... + 246121.

Almost surely, 2^3937816 is an apocalyptic number.

It is an amenable number.

3937816 is a deficient number, since it is larger than the sum of its proper divisors (3445604).

3937816 is a wasteful number, since it uses less digits than its factorization.

3937816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492233 (or 492229 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 3937816 is about 1984.3931062166. The cubic root of 3937816 is about 157.9132141028.

It can be divided in two parts, 3937 and 816, that added together give a triangular number (4753 = T₉₇).

The spelling of 3937816 in words is "three million, nine hundred thirty-seven thousand, eight hundred sixteen".