3721688 has 8 divisors (see below), whose sum is σ = 6978180. Its totient is φ = 1860840.

The previous prime is 3721673. The next prime is 3721717. The reversal of 3721688 is 8861273.

3721688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232598 + ... + 232613.

Almost surely, 2^3721688 is an apocalyptic number.

It is an amenable number.

3721688 is a deficient number, since it is larger than the sum of its proper divisors (3256492).

3721688 is a wasteful number, since it uses less digits than its factorization.

3721688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465217 (or 465213 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 3721688 is about 1929.1676961840. The cubic root of 3721688 is about 154.9696506656.

The spelling of 3721688 in words is "three million, seven hundred twenty-one thousand, six hundred eighty-eight".