13091040 has 72 divisors (see below), whose sum is σ = 44678088. Its totient is φ = 3490560.

The previous prime is 13090967. The next prime is 13091041. The reversal of 13091040 is 4019031.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13091041) 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, 3106 + ... + 5985.

It is an arithmetic number, because the mean of its divisors is an integer number (620529).

Almost surely, 2^13091040 is an apocalyptic number.

13091040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13091040 is an abundant number, since it is smaller than the sum of its proper divisors (31587048).

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

13091040 is a wasteful number, since it uses less digits than its factorization.

13091040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9112 (or 9101 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 13091040 is about 3618.1542255686. The cubic root of 13091040 is about 235.6810783602.

The spelling of 13091040 in words is "thirteen million, ninety-one thousand, forty".