728156 has 48 divisors (see below), whose sum is σ = 1599360. Its totient is φ = 285120.

The previous prime is 728131. The next prime is 728173. The reversal of 728156 is 651827.

728156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×728156² = 1060422320672, which contains 22 as substring.

Its product of digits (3360) is a multiple of the sum of its prime divisors (112).

It is a congruent number.

It is an unprimeable number.

728156 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 15 ways as a sum of consecutive naturals, for example, 10835 + ... + 10901.

It is an arithmetic number, because the mean of its divisors is an integer number (33320).

2⁷²⁸¹⁵⁶ is an apocalyptic number.

728156 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

728156 is an abundant number, since it is smaller than the sum of its proper divisors (871204).

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

728156 is a wasteful number, since it uses less digits than its factorization.

728156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 112 counting only the distinct ones).

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

The square root of 728156 is about 853.3205728213. The cubic root of 728156 is about 89.9652540772.

It can be divided in two parts, 7281 and 56, that added together give a palindrome (7337).

The spelling of 728156 in words is "seven hundred twenty-eight thousand, one hundred fifty-six".