720156 has 12 divisors (see below), whose sum is σ = 1680392. Its totient is φ = 240048.

The previous prime is 720151. The next prime is 720173. The reversal of 720156 is 651027.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720151) 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, 29995 + ... + 30018.

2⁷²⁰¹⁵⁶ is an apocalyptic number.

It is an amenable number.

720156 is an abundant number, since it is smaller than the sum of its proper divisors (960236).

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

720156 is a wasteful number, since it uses less digits than its factorization.

720156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60020 (or 60018 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 720156 is about 848.6200563267. The cubic root of 720156 is about 89.6345676039.

The spelling of 720156 in words is "seven hundred twenty thousand, one hundred fifty-six".