156728 has 32 divisors (see below), whose sum is σ = 347760. Its totient is φ = 65280.

The previous prime is 156727. The next prime is 156733. The reversal of 156728 is 827651.

It is a self number, because there is not a number n which added to its sum of digits gives 156728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076 + ... + 1212.

2¹⁵⁶⁷²⁸ 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 156728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173880).

156728 is an abundant number, since it is smaller than the sum of its proper divisors (191032).

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

156728 is a wasteful number, since it uses less digits than its factorization.

156728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 163 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 156728 is about 395.8888732965. Note that the first 4 decimals coincide. The cubic root of 156728 is about 53.9157350599.

The spelling of 156728 in words is "one hundred fifty-six thousand, seven hundred twenty-eight".