13387776 has 48 divisors (see below), whose sum is σ = 35708400. Its totient is φ = 4460544.

The previous prime is 13387769. The next prime is 13387783. The reversal of 13387776 is 67778331.

It is an interprime number because it is at equal distance from previous prime (13387769) and next prime (13387783).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055 + ... + 7233.

It is an arithmetic number, because the mean of its divisors is an integer number (743925).

Almost surely, 2^13387776 is an apocalyptic number.

13387776 is a gapful number since it is divisible by the number (16) 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 13387776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17854200).

13387776 is an abundant number, since it is smaller than the sum of its proper divisors (22320624).

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

13387776 is an equidigital number, since it uses as much as digits as its factorization.

13387776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2184 counting only the distinct ones).

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

The square root of 13387776 is about 3658.9309914236. The cubic root of 13387776 is about 237.4485266104.

The spelling of 13387776 in words is "thirteen million, three hundred eighty-seven thousand, seven hundred seventy-six".