13921440378 has 8 divisors (see below), whose sum is σ = 27842880768. Its totient is φ = 4640480124.

The previous prime is 13921440371. The next prime is 13921440389. The reversal of 13921440378 is 87304412931.

It is a sphenic number, since it is the product of 3 distinct primes.

13921440378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13921440371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160120026 + ... + 1160120037.

It is an arithmetic number, because the mean of its divisors is an integer number (3480360096).

Almost surely, 2^13921440378 is an apocalyptic number.

13921440378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13921440378 is a wasteful number, since it uses less digits than its factorization.

13921440378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320240068.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 13921440378 in words is "thirteen billion, nine hundred twenty-one million, four hundred forty thousand, three hundred seventy-eight".