13613776 has 20 divisors (see below), whose sum is σ = 28774944. Its totient is φ = 6188000.

The previous prime is 13613771. The next prime is 13613779. The reversal of 13613776 is 67731631.

It is a happy number.

It is a super-4 number, since 4×13613776⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38500 + ... + 38851.

Almost surely, 2^13613776 is an apocalyptic number.

13613776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13613776 is an abundant number, since it is smaller than the sum of its proper divisors (15161168).

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

13613776 is a wasteful number, since it uses less digits than its factorization.

13613776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77370 (or 77364 counting only the distinct ones).

The product of its digits is 15876, while the sum is 34.

The square root of 13613776 is about 3689.6850814128. The cubic root of 13613776 is about 238.7772064059. Note that the first 3 decimals are identical.

The spelling of 13613776 in words is "thirteen million, six hundred thirteen thousand, seven hundred seventy-six".