3969616 has 60 divisors (see below), whose sum is σ = 9325792. Its totient is φ = 1603008.

The previous prime is 3969611. The next prime is 3969629. The reversal of 3969616 is 6169693.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969611) 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, 59215 + ... + 59281.

Almost surely, 2^3969616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3969616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4662896).

3969616 is an abundant number, since it is smaller than the sum of its proper divisors (5356176).

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

3969616 is a wasteful number, since it uses less digits than its factorization.

3969616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 99 counting only the distinct ones).

The product of its digits is 52488, while the sum is 40.

The square root of 3969616 is about 1992.3895201491. The cubic root of 3969616 is about 158.3371532473.

The spelling of 3969616 in words is "three million, nine hundred sixty-nine thousand, six hundred sixteen".