13781608 has 32 divisors (see below), whose sum is σ = 27141120. Its totient is φ = 6552000.

The previous prime is 13781591. The next prime is 13781653. The reversal of 13781608 is 80618731.

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, 14673 + ... + 15583.

It is an arithmetic number, because the mean of its divisors is an integer number (848160).

Almost surely, 2^13781608 is an apocalyptic number.

It is an amenable number.

13781608 is a deficient number, since it is larger than the sum of its proper divisors (13359512).

13781608 is a wasteful number, since it uses less digits than its factorization.

13781608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 13781608 is about 3712.3588188644. The cubic root of 13781608 is about 239.7544247316.

The spelling of 13781608 in words is "thirteen million, seven hundred eighty-one thousand, six hundred eight".