3861156 has 48 divisors (see below), whose sum is σ = 9906624. Its totient is φ = 1163136.

The previous prime is 3861119. The next prime is 3861167. The reversal of 3861156 is 6511683.

Its product of digits (4320) is a multiple of the sum of its prime factors (540).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035 + ... + 8501.

It is an arithmetic number, because the mean of its divisors is an integer number (206388).

Almost surely, 2^3861156 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 3861156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4953312).

3861156 is an abundant number, since it is smaller than the sum of its proper divisors (6045468).

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

3861156 is a wasteful number, since it uses less digits than its factorization.

3861156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 3861156 is about 1964.9824426697. The cubic root of 3861156 is about 156.8817587814.

The spelling of 3861156 in words is "three million, eight hundred sixty-one thousand, one hundred fifty-six".