3721916 has 12 divisors (see below), whose sum is σ = 7105560. Its totient is φ = 1691760.

The previous prime is 3721901. The next prime is 3721919. The reversal of 3721916 is 6191273.

It is a super-2 number, since 2×3721916² = 27705317422112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42251 + ... + 42338.

It is an arithmetic number, because the mean of its divisors is an integer number (592130).

Almost surely, 2^3721916 is an apocalyptic number.

It is an amenable number.

3721916 is a deficient number, since it is larger than the sum of its proper divisors (3383644).

3721916 is a wasteful number, since it uses less digits than its factorization.

3721916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84604 (or 84602 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 3721916 is about 1929.2267881200. The cubic root of 3721916 is about 154.9728152116.

The spelling of 3721916 in words is "three million, seven hundred twenty-one thousand, nine hundred sixteen".