720872 has 16 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 358000.

The previous prime is 720869. The next prime is 720877. The reversal of 720872 is 278027.

720872 = T₂₃₃ + T₂₃₄ + ... + T₂₅₆.

It is not an unprimeable number, because it can be changed into a prime (720877) 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, 1829 + ... + 2187.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2⁷²⁰⁸⁷² is an apocalyptic number.

It is an amenable number.

720872 is a deficient number, since it is larger than the sum of its proper divisors (639928).

720872 is a wasteful number, since it uses less digits than its factorization.

720872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 720872 is about 849.0418128691. The cubic root of 720872 is about 89.6642635276.

Adding to 720872 its reverse (278027), we get a palindrome (998899).

The spelling of 720872 in words is "seven hundred twenty thousand, eight hundred seventy-two".