3721716 has 36 divisors (see below), whose sum is σ = 9554272. Its totient is φ = 1221264.

The previous prime is 3721673. The next prime is 3721717. The reversal of 3721716 is 6171273.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3721716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1641 + ... + 3183.

Almost surely, 2^3721716 is an apocalyptic number.

3721716 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3721716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4777136).

3721716 is an abundant number, since it is smaller than the sum of its proper divisors (5832556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3721716 is a wasteful number, since it uses less digits than its factorization.

3721716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 1615 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 3721716 is about 1929.1749531859. The cubic root of 3721716 is about 154.9700393010.

Adding to 3721716 its reverse (6171273), we get a palindrome (9892989).

The spelling of 3721716 in words is "three million, seven hundred twenty-one thousand, seven hundred sixteen".