13779744 has 48 divisors (see below), whose sum is σ = 39463200. Its totient is φ = 4175360.

The previous prime is 13779719. The next prime is 13779757. The reversal of 13779744 is 44797731.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 13779696 and 13779705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5469 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (822150).

Almost surely, 2^13779744 is an apocalyptic number.

It is an amenable number.

13779744 is an abundant number, since it is smaller than the sum of its proper divisors (25683456).

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

13779744 is a wasteful number, since it uses less digits than its factorization.

13779744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13073 (or 13065 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 13779744 is about 3712.1077570566. The cubic root of 13779744 is about 239.7436150980.

The spelling of 13779744 in words is "thirteen million, seven hundred seventy-nine thousand, seven hundred forty-four".