13661408 has 12 divisors (see below), whose sum is σ = 26895960. Its totient is φ = 6830688.

The previous prime is 13661369. The next prime is 13661419. The reversal of 13661408 is 80416631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213428 + ... + 213491.

It is an arithmetic number, because the mean of its divisors is an integer number (2241330).

Almost surely, 2^13661408 is an apocalyptic number.

It is an amenable number.

13661408 is a deficient number, since it is larger than the sum of its proper divisors (13234552).

13661408 is an equidigital number, since it uses as much as digits as its factorization.

13661408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426929 (or 426921 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13661408 is about 3696.1341966979. The cubic root of 13661408 is about 239.0553608559.

The spelling of 13661408 in words is "thirteen million, six hundred sixty-one thousand, four hundred eight".