156720072 has 16 divisors (see below), whose sum is σ = 391800240. Its totient is φ = 52240016.

The previous prime is 156720071. The next prime is 156720077. The reversal of 156720072 is 270027651.

156720072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156720072² = 49122361935370368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156720071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264978 + ... + 3265025.

It is an arithmetic number, because the mean of its divisors is an integer number (24487515).

Almost surely, 2^156720072 is an apocalyptic number.

156720072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156720072 is an abundant number, since it is smaller than the sum of its proper divisors (235080168).

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

156720072 is a wasteful number, since it uses less digits than its factorization.

156720072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530012 (or 6530008 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 156720072 is about 12518.7887593010. The cubic root of 156720072 is about 539.1482594531.

The spelling of 156720072 in words is "one hundred fifty-six million, seven hundred twenty thousand, seventy-two".