720772 has 24 divisors (see below), whose sum is σ = 1382976. Its totient is φ = 326688.

The previous prime is 720767. The next prime is 720773. The reversal of 720772 is 277027.

It is not an unprimeable number, because it can be changed into a prime (720773) by changing a digit.

720772 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 7 ways as a sum of consecutive naturals, for example, 4233 + ... + 4399.

It is an arithmetic number, because the mean of its divisors is an integer number (57624).

2⁷²⁰⁷⁷² is an apocalyptic number.

It is an amenable number.

720772 is a deficient number, since it is larger than the sum of its proper divisors (662204).

720772 is a wasteful number, since it uses less digits than its factorization.

720772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 720772 is about 848.9829209118. The cubic root of 720772 is about 89.6601172339.

Subtracting from 720772 its product of nonzero digits (1372), we obtain a triangular number (719400 = T₁₁₉₉).

Adding to 720772 its reverse (277027), we get a palindrome (997799).

The spelling of 720772 in words is "seven hundred twenty thousand, seven hundred seventy-two", and thus it is an iban number.