4381380 has 72 divisors (see below), whose sum is σ = 13477464. Its totient is φ = 1152000.

The previous prime is 4381379. The next prime is 4381409. The reversal of 4381380 is 831834.

It can be written as a sum of positive squares in 4 ways, for example, as 2022084 + 2359296 = 1422^2 + 1536^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18060 + ... + 18300.

It is an arithmetic number, because the mean of its divisors is an integer number (187187).

Almost surely, 2^4381380 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 4381380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6738732).

4381380 is an abundant number, since it is smaller than the sum of its proper divisors (9096084).

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

4381380 is a wasteful number, since it uses less digits than its factorization.

4381380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4381380 is about 2093.1746224336. The cubic root of 4381380 is about 163.6327793828.

It can be divided in two parts, 4381 and 380, that added together give a square (4761 = 69²).

The spelling of 4381380 in words is "four million, three hundred eighty-one thousand, three hundred eighty".