13779944 has 16 divisors (see below), whose sum is σ = 26961120. Its totient is φ = 6590320.

The previous prime is 13779907. The next prime is 13779949. The reversal of 13779944 is 44997731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13779895 and 13779904.

It is not an unprimeable number, because it can be changed into a prime (13779949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37262 + ... + 37629.

It is an arithmetic number, because the mean of its divisors is an integer number (1685070).

Almost surely, 2^13779944 is an apocalyptic number.

It is an amenable number.

13779944 is a deficient number, since it is larger than the sum of its proper divisors (13181176).

13779944 is a wasteful number, since it uses less digits than its factorization.

13779944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74920 (or 74916 counting only the distinct ones).

The product of its digits is 190512, while the sum is 44.

The square root of 13779944 is about 3712.1346958320. The cubic root of 13779944 is about 239.7447749766.

The spelling of 13779944 in words is "thirteen million, seven hundred seventy-nine thousand, nine hundred forty-four".