13618408 has 16 divisors (see below), whose sum is σ = 25585380. Its totient is φ = 6795648.

The previous prime is 13618399. The next prime is 13618427. The reversal of 13618408 is 80481631.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 3771364 = 3138^2 + 1942^2 .

It is a super-2 number, since 2×13618408² = 370922072908928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13618408.

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, 3516 + ... + 6292.

Almost surely, 2^13618408 is an apocalyptic number.

It is an amenable number.

13618408 is a deficient number, since it is larger than the sum of its proper divisors (11966972).

13618408 is a wasteful number, since it uses less digits than its factorization.

13618408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 13618408 is about 3690.3127238759. The cubic root of 13618408 is about 238.8042841397.

The spelling of 13618408 in words is "thirteen million, six hundred eighteen thousand, four hundred eight".