13871004 has 48 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 3855168.

The previous prime is 13870979. The next prime is 13871023. The reversal of 13871004 is 40017831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877 + ... + 5339.

It is an arithmetic number, because the mean of its divisors is an integer number (791616).

Almost surely, 2^13871004 is an apocalyptic number.

13871004 is a gapful number since it is divisible by the number (14) 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 13871004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18998784).

13871004 is an abundant number, since it is smaller than the sum of its proper divisors (24126564).

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

13871004 is a wasteful number, since it uses less digits than its factorization.

13871004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 13871004 is about 3724.3796798930. The cubic root of 13871004 is about 240.2717061718.

Adding to 13871004 its reverse (40017831), we get a palindrome (53888835).

The spelling of 13871004 in words is "thirteen million, eight hundred seventy-one thousand, four".