3871380 has 48 divisors (see below), whose sum is σ = 10954944. Its totient is φ = 1021440.

The previous prime is 3871363. The next prime is 3871381. The reversal of 3871380 is 831783.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871381) 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, 6495 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (228228).

Almost surely, 2^3871380 is an apocalyptic number.

3871380 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 3871380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5477472).

3871380 is an abundant number, since it is smaller than the sum of its proper divisors (7083564).

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

3871380 is a wasteful number, since it uses less digits than its factorization.

3871380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 3871380 is about 1967.5822727398. The cubic root of 3871380 is about 157.0201064219.

The spelling of 3871380 in words is "three million, eight hundred seventy-one thousand, three hundred eighty".