13649490 has 48 divisors (see below), whose sum is σ = 36324288. Its totient is φ = 3554208.

The previous prime is 13649483. The next prime is 13649491. The reversal of 13649490 is 9494631.

13649490 is a `hidden beast` number, since 1 + 3 + 649 + 4 + 9 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13649491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2107 + ... + 5633.

It is an arithmetic number, because the mean of its divisors is an integer number (756756).

Almost surely, 2^13649490 is an apocalyptic number.

13649490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13649490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18162144).

13649490 is an abundant number, since it is smaller than the sum of its proper divisors (22674798).

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

13649490 is a wasteful number, since it uses less digits than its factorization.

13649490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583 (or 3580 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 13649490 is about 3694.5216199124. The cubic root of 13649490 is about 238.9858245708.

The spelling of 13649490 in words is "thirteen million, six hundred forty-nine thousand, four hundred ninety".