13872840 has 64 divisors (see below), whose sum is σ = 41904000. Its totient is φ = 3674112.

The previous prime is 13872829. The next prime is 13872851. The reversal of 13872840 is 4827831.

It is an interprime number because it is at equal distance from previous prime (13872829) and next prime (13872851).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22861 + ... + 23459.

It is an arithmetic number, because the mean of its divisors is an integer number (654750).

Almost surely, 2^13872840 is an apocalyptic number.

13872840 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 13872840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20952000).

13872840 is an abundant number, since it is smaller than the sum of its proper divisors (28031160).

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

13872840 is a wasteful number, since it uses less digits than its factorization.

13872840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 13872840 is about 3724.6261557370. The cubic root of 13872840 is about 240.2823066876.

The spelling of 13872840 in words is "thirteen million, eight hundred seventy-two thousand, eight hundred forty".