13649800 has 48 divisors (see below), whose sum is σ = 32029200. Its totient is φ = 5409600.

The previous prime is 13649773. The next prime is 13649803. The reversal of 13649800 is 894631.

It is not an unprimeable number, because it can be changed into a prime (13649803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27555 + ... + 28045.

It is an arithmetic number, because the mean of its divisors is an integer number (667275).

Almost surely, 2^13649800 is an apocalyptic number.

13649800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13649800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16014600).

13649800 is an abundant number, since it is smaller than the sum of its proper divisors (18379400).

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

13649800 is a wasteful number, since it uses less digits than its factorization.

13649800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13649800 is about 3694.5635736850. The cubic root of 13649800 is about 238.9876337970.

The spelling of 13649800 in words is "thirteen million, six hundred forty-nine thousand, eight hundred".