13878351 has 8 divisors (see below), whose sum is σ = 20560560. Its totient is φ = 9252216.

The previous prime is 13878349. The next prime is 13878373. The reversal of 13878351 is 15387831.

It is not a de Polignac number, because 13878351 - 2¹ = 13878349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 256980 + ... + 257033.

It is an arithmetic number, because the mean of its divisors is an integer number (2570070).

Almost surely, 2^13878351 is an apocalyptic number.

13878351 is a deficient number, since it is larger than the sum of its proper divisors (6682209).

13878351 is an equidigital number, since it uses as much as digits as its factorization.

13878351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514022 (or 514016 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 13878351 is about 3725.3658880706. The cubic root of 13878351 is about 240.3141199401.

The spelling of 13878351 in words is "thirteen million, eight hundred seventy-eight thousand, three hundred fifty-one".