156328720 has 40 divisors (see below), whose sum is σ = 366701976. Its totient is φ = 61974528.

The previous prime is 156328703. The next prime is 156328729. The reversal of 156328720 is 27823651.

It is a happy number.

156328720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13191424 + 143137296 = 3632^2 + 11964^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (156328729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394 + ... + 17686.

Almost surely, 2^156328720 is an apocalyptic number.

156328720 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 156328720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183350988).

156328720 is an abundant number, since it is smaller than the sum of its proper divisors (210373256).

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

156328720 is a wasteful number, since it uses less digits than its factorization.

156328720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17419 (or 17413 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 156328720 is about 12503.1484035022. The cubic root of 156328720 is about 538.6991091081.

The spelling of 156328720 in words is "one hundred fifty-six million, three hundred twenty-eight thousand, seven hundred twenty".