13156836 has 96 divisors (see below), whose sum is σ = 39674880. Its totient is φ = 3292800.

The previous prime is 13156831. The next prime is 13156837. The reversal of 13156836 is 63865131.

13156836 = T₂₃ + T₂₄ + ... + T₄₂₈.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 13156797 and 13156806.

It is not an unprimeable number, because it can be changed into a prime (13156831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26551 + ... + 27041.

It is an arithmetic number, because the mean of its divisors is an integer number (413280).

Almost surely, 2^13156836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13156836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19837440).

13156836 is an abundant number, since it is smaller than the sum of its proper divisors (26518044).

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

13156836 is a wasteful number, since it uses less digits than its factorization.

13156836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 543 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 13156836 is about 3627.2353108118. The cubic root of 13156836 is about 236.0752656613.

The spelling of 13156836 in words is "thirteen million, one hundred fifty-six thousand, eight hundred thirty-six".