13156740 has 72 divisors (see below), whose sum is σ = 42020160. Its totient is φ = 3322944.

The previous prime is 13156733. The next prime is 13156763. The reversal of 13156740 is 4765131.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1497 + ... + 5343.

Almost surely, 2^13156740 is an apocalyptic number.

13156740 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 13156740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21010080).

13156740 is an abundant number, since it is smaller than the sum of its proper divisors (28863420).

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

13156740 is a wasteful number, since it uses less digits than its factorization.

13156740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3876 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 13156740 is about 3627.2220775685. Note that the first 3 decimals coincide. The cubic root of 13156740 is about 236.0746914786.

The spelling of 13156740 in words is "thirteen million, one hundred fifty-six thousand, seven hundred forty".