720738228 has 24 divisors (see below), whose sum is σ = 1921968832. Its totient is φ = 205925184.

The previous prime is 720738203. The next prime is 720738233. The reversal of 720738228 is 822837027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290025 + ... + 4290192.

Almost surely, 2^720738228 is an apocalyptic number.

It is an amenable number.

720738228 is an abundant number, since it is smaller than the sum of its proper divisors (1201230604).

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

720738228 is a wasteful number, since it uses less digits than its factorization.

720738228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580231 (or 8580229 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 720738228 is about 26846.5682723137. The cubic root of 720738228 is about 896.5871686098.

The spelling of 720738228 in words is "seven hundred twenty million, seven hundred thirty-eight thousand, two hundred twenty-eight".