13831380 has 72 divisors (see below), whose sum is σ = 42954912. Its totient is φ = 3600576.

The previous prime is 13831361. The next prime is 13831393. The reversal of 13831380 is 8313831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6847 + ... + 8633.

It is an arithmetic number, because the mean of its divisors is an integer number (596596).

Almost surely, 2^13831380 is an apocalyptic number.

13831380 is a gapful number since it is divisible by the number (10) 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 13831380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21477456).

13831380 is an abundant number, since it is smaller than the sum of its proper divisors (29123532).

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

13831380 is a wasteful number, since it uses less digits than its factorization.

13831380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13831380 is about 3719.0563319208. The cubic root of 13831380 is about 240.0427007356.

The spelling of 13831380 in words is "thirteen million, eight hundred thirty-one thousand, three hundred eighty".