13257660 has 96 divisors (see below), whose sum is σ = 41771520. Its totient is φ = 3117312.

The previous prime is 13257659. The next prime is 13257689. The reversal of 13257660 is 6675231.

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

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 17571 + ... + 18309.

It is an arithmetic number, because the mean of its divisors is an integer number (435120).

Almost surely, 2^13257660 is an apocalyptic number.

13257660 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 13257660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20885760).

13257660 is an abundant number, since it is smaller than the sum of its proper divisors (28513860).

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

13257660 is a wasteful number, since it uses less digits than its factorization.

13257660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 13257660 is about 3641.1069745340. The cubic root of 13257660 is about 236.6767656428.

The spelling of 13257660 in words is "thirteen million, two hundred fifty-seven thousand, six hundred sixty".