13778996 has 72 divisors (see below), whose sum is σ = 31281600. Its totient is φ = 5303760.

The previous prime is 13778983. The next prime is 13779011. The reversal of 13778996 is 69987731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165971 + ... + 166053.

Almost surely, 2^13778996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13778996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15640800).

13778996 is an abundant number, since it is smaller than the sum of its proper divisors (17502604).

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

13778996 is a wasteful number, since it uses less digits than its factorization.

13778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 103 counting only the distinct ones).

The product of its digits is 571536, while the sum is 50.

The square root of 13778996 is about 3712.0070043037. The cubic root of 13778996 is about 239.7392770525.

The spelling of 13778996 in words is "thirteen million, seven hundred seventy-eight thousand, nine hundred ninety-six".