13813878 has 16 divisors (see below), whose sum is σ = 29753136. Its totient is φ = 4250400.

The previous prime is 13813873. The next prime is 13813883. The reversal of 13813878 is 87831831.

13813878 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13813873) and next prime (13813883).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13813873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88473 + ... + 88628.

It is an arithmetic number, because the mean of its divisors is an integer number (1859571).

Almost surely, 2^13813878 is an apocalyptic number.

13813878 is an abundant number, since it is smaller than the sum of its proper divisors (15939258).

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

13813878 is a wasteful number, since it uses less digits than its factorization.

13813878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177119.

The product of its digits is 32256, while the sum is 39.

The square root of 13813878 is about 3716.7025708281. The cubic root of 13813878 is about 239.9414093087.

The spelling of 13813878 in words is "thirteen million, eight hundred thirteen thousand, eight hundred seventy-eight".