13649408 has 40 divisors (see below), whose sum is σ = 27841968. Its totient is φ = 6682624.

The previous prime is 13649407. The next prime is 13649417. The reversal of 13649408 is 80494631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13649407) 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, 26885 + ... + 27387.

Almost surely, 2^13649408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13649408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13920984).

13649408 is an abundant number, since it is smaller than the sum of its proper divisors (14192560).

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

13649408 is an frugal number, since it uses more digits than its factorization.

13649408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 13649408 is about 3694.5105223832. The cubic root of 13649408 is about 238.9853459967.

The spelling of 13649408 in words is "thirteen million, six hundred forty-nine thousand, four hundred eight".