3861120 has 64 divisors (see below), whose sum is σ = 12313440. Its totient is φ = 1029120.

The previous prime is 3861119. The next prime is 3861167. The reversal of 3861120 is 211683.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915 + ... + 2925.

Almost surely, 2^3861120 is an apocalyptic number.

3861120 is a gapful number since it is divisible by the number (30) 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 3861120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6156720).

3861120 is an abundant number, since it is smaller than the sum of its proper divisors (8452320).

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

3861120 is a wasteful number, since it uses less digits than its factorization.

3861120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3861120 is about 1964.9732822611. The cubic root of 3861120 is about 156.8812712106.

The spelling of 3861120 in words is "three million, eight hundred sixty-one thousand, one hundred twenty".