13540890 has 64 divisors (see below), whose sum is σ = 36443520. Its totient is φ = 3191040.

The previous prime is 13540889. The next prime is 13540897. The reversal of 13540890 is 9804531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13540897) 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 31 ways as a sum of consecutive naturals, for example, 11656 + ... + 12764.

It is an arithmetic number, because the mean of its divisors is an integer number (569430).

Almost surely, 2^13540890 is an apocalyptic number.

13540890 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 13540890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18221760).

13540890 is an abundant number, since it is smaller than the sum of its proper divisors (22902630).

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

13540890 is a wasteful number, since it uses less digits than its factorization.

13540890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13540890 is about 3679.7948312372. The cubic root of 13540890 is about 238.3503185552.

The spelling of 13540890 in words is "thirteen million, five hundred forty thousand, eight hundred ninety".