8720732 has 6 divisors (see below), whose sum is σ = 15261288. Its totient is φ = 4360364.

The previous prime is 8720729. The next prime is 8720771. The reversal of 8720732 is 2370278.

8720732 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 8720695 and 8720704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090088 + ... + 1090095.

It is an arithmetic number, because the mean of its divisors is an integer number (2543548).

Almost surely, 2^8720732 is an apocalyptic number.

It is an amenable number.

8720732 is a deficient number, since it is larger than the sum of its proper divisors (6540556).

8720732 is a wasteful number, since it uses less digits than its factorization.

8720732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180187 (or 2180185 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 8720732 is about 2953.0885526851. The cubic root of 8720732 is about 205.8342525743.

The spelling of 8720732 in words is "eight million, seven hundred twenty thousand, seven hundred thirty-two".