13169640 has 96 divisors (see below), whose sum is σ = 43475040. Its totient is φ = 3189120.

The previous prime is 13169609. The next prime is 13169657. The reversal of 13169640 is 4696131.

It is a Cunningham number, because it is equal to 3629²-1.

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

It is a junction number, because it is equal to n+sod(n) for n = 13169598 and 13169607.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14067 + ... + 14973.

It is an arithmetic number, because the mean of its divisors is an integer number (452865).

Almost surely, 2^13169640 is an apocalyptic number.

13169640 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 13169640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21737520).

13169640 is an abundant number, since it is smaller than the sum of its proper divisors (30305400).

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

13169640 is a wasteful number, since it uses less digits than its factorization.

13169640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 13169640 is about 3628.9998622210. Note that the first 3 decimals coincide. The cubic root of 13169640 is about 236.1518222560.

It can be divided in two parts, 13 and 169640, that added together give a triangular number (169653 = T₅₈₂).

The spelling of 13169640 in words is "thirteen million, one hundred sixty-nine thousand, six hundred forty".