13449618 has 192 divisors, whose sum is σ = 41368320. Its totient is φ = 3193344.

The previous prime is 13449617. The next prime is 13449677. The reversal of 13449618 is 81694431.

13449618 is a `hidden beast` number, since 1 + 34 + 4 + 9 + 618 = 666.

13449618 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13449617) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 584755 + ... + 584777.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^13449618 is an apocalyptic number.

13449618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13449618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

13449618 is an abundant number, since it is smaller than the sum of its proper divisors (27918702).

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

13449618 is a wasteful number, since it uses less digits than its factorization.

13449618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 65 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 13449618 is about 3667.3720836588. The cubic root of 13449618 is about 237.8135795090.

The spelling of 13449618 in words is "thirteen million, four hundred forty-nine thousand, six hundred eighteen".