816156 has 60 divisors (see below), whose sum is σ = 2337720. Its totient is φ = 246240.

The previous prime is 816133. The next prime is 816157. The reversal of 816156 is 651618.

It is a super-2 number, since 2×816156² = 1332221232672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816157) by changing a digit.

816156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3450 + ... + 3678.

It is an arithmetic number, because the mean of its divisors is an integer number (38962).

2⁸¹⁶¹⁵⁶ 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 816156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168860).

816156 is an abundant number, since it is smaller than the sum of its proper divisors (1521564).

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

816156 is a wasteful number, since it uses less digits than its factorization.

816156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 245 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 816156 is about 903.4135265757. The cubic root of 816156 is about 93.4525291164.

The spelling of 816156 in words is "eight hundred sixteen thousand, one hundred fifty-six".