3921696 has 120 divisors (see below), whose sum is σ = 12349260. Its totient is φ = 1216512.

The previous prime is 3921689. The next prime is 3921719. The reversal of 3921696 is 6961293.

It can be written as a sum of positive squares in 2 ways, for example, as 3920400 + 1296 = 1980^2 + 36^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 3921696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44020 + ... + 44108.

Almost surely, 2^3921696 is an apocalyptic number.

3921696 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 3921696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6174630).

3921696 is an abundant number, since it is smaller than the sum of its proper divisors (8427564).

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

3921696 is a wasteful number, since it uses less digits than its factorization.

3921696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 111 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3921696 is about 1980.3272456844. The cubic root of 3921696 is about 157.6974394645.

The spelling of 3921696 in words is "three million, nine hundred twenty-one thousand, six hundred ninety-six".