13491400 has 48 divisors (see below), whose sum is σ = 33786900. Its totient is φ = 4980480.

The previous prime is 13491389. The next prime is 13491403. The reversal of 13491400 is 419431.

It can be written as a sum of positive squares in 6 ways, for example, as 4334724 + 9156676 = 2082^2 + 3026^2 .

It is not an unprimeable number, because it can be changed into a prime (13491403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6 + ... + 5194.

Almost surely, 2^13491400 is an apocalyptic number.

13491400 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 13491400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16893450).

13491400 is an abundant number, since it is smaller than the sum of its proper divisors (20295500).

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

13491400 is a wasteful number, since it uses less digits than its factorization.

13491400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218 (or 5209 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13491400 is about 3673.0641159664. The cubic root of 13491400 is about 238.0595853917.

The spelling of 13491400 in words is "thirteen million, four hundred ninety-one thousand, four hundred".