3871560 has 128 divisors (see below), whose sum is σ = 14515200. Its totient is φ = 802560.

The previous prime is 3871547. The next prime is 3871579. The reversal of 3871560 is 651783.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9031 + ... + 9449.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

Almost surely, 2^3871560 is an apocalyptic number.

3871560 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 3871560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7257600).

3871560 is an abundant number, since it is smaller than the sum of its proper divisors (10643640).

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

3871560 is a wasteful number, since it uses less digits than its factorization.

3871560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 3871560 is about 1967.6280136245. The cubic root of 3871560 is about 157.0225399367.

The spelling of 3871560 in words is "three million, eight hundred seventy-one thousand, five hundred sixty".