13978194432 has 120 divisors (see below), whose sum is σ = 38930518704. Its totient is φ = 4456556544.

The previous prime is 13978194431. The next prime is 13978194479. The reversal of 13978194432 is 23449187931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13978194431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803943 + ... + 821145.

Almost surely, 2^13978194432 is an apocalyptic number.

13978194432 is a gapful number since it is divisible by the number (12) 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 13978194432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19465259352).

13978194432 is an abundant number, since it is smaller than the sum of its proper divisors (24952324272).

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

13978194432 is an equidigital number, since it uses as much as digits as its factorization.

13978194432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17270 (or 17231 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The spelling of 13978194432 in words is "thirteen billion, nine hundred seventy-eight million, one hundred ninety-four thousand, four hundred thirty-two".