13469840 has 40 divisors (see below), whose sum is σ = 31571640. Its totient is φ = 5344256.

The previous prime is 13469809. The next prime is 13469849. The reversal of 13469840 is 4896431.

It can be written as a sum of positive squares in 4 ways, for example, as 5607424 + 7862416 = 2368^2 + 2804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 13469840.

It is not an unprimeable number, because it can be changed into a prime (13469849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10346 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (789291).

Almost surely, 2^13469840 is an apocalyptic number.

13469840 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 13469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15785820).

13469840 is an abundant number, since it is smaller than the sum of its proper divisors (18101800).

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

13469840 is a wasteful number, since it uses less digits than its factorization.

13469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 13469840 is about 3670.1280631607. The cubic root of 13469840 is about 237.9327070067.

The spelling of 13469840 in words is "thirteen million, four hundred sixty-nine thousand, eight hundred forty".