3969156 has 48 divisors (see below), whose sum is σ = 9846144. Its totient is φ = 1241856.

The previous prime is 3969151. The next prime is 3969167. The reversal of 3969156 is 6519693.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20050 + ... + 20246.

It is an arithmetic number, because the mean of its divisors is an integer number (205128).

Almost surely, 2^3969156 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 3969156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4923072).

3969156 is an abundant number, since it is smaller than the sum of its proper divisors (5876988).

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

3969156 is a wasteful number, since it uses less digits than its factorization.

3969156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 298 counting only the distinct ones).

The product of its digits is 43740, while the sum is 39.

The square root of 3969156 is about 1992.2740775305. The cubic root of 3969156 is about 158.3310369627.

The spelling of 3969156 in words is "three million, nine hundred sixty-nine thousand, one hundred fifty-six".