13898538378 has 24 divisors (see below), whose sum is σ = 30128037888. Its totient is φ = 4630609512.

The previous prime is 13898538359. The next prime is 13898538421. The reversal of 13898538378 is 87383589831.

13898538378 is a `hidden beast` number, since 1 + 3 + 8 + 98 + 538 + 3 + 7 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147850 + ... + 222837.

It is an arithmetic number, because the mean of its divisors is an integer number (1255334912).

Almost surely, 2^13898538378 is an apocalyptic number.

13898538378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13898538378 is an abundant number, since it is smaller than the sum of its proper divisors (16229499510).

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

13898538378 is a wasteful number, since it uses less digits than its factorization.

13898538378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372778 (or 372775 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 13898538378 in words is "thirteen billion, eight hundred ninety-eight million, five hundred thirty-eight thousand, three hundred seventy-eight".