720554228 has 12 divisors (see below), whose sum is σ = 1261180032. Its totient is φ = 360217080.

The previous prime is 720554209. The next prime is 720554249. The reversal of 720554228 is 822455027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22301 + ... + 44027.

It is an arithmetic number, because the mean of its divisors is an integer number (105098336).

Almost surely, 2^720554228 is an apocalyptic number.

It is an amenable number.

720554228 is a deficient number, since it is larger than the sum of its proper divisors (540625804).

720554228 is a wasteful number, since it uses less digits than its factorization.

720554228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30022 (or 30020 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 720554228 is about 26843.1411723740. The cubic root of 720554228 is about 896.5108644014.

The spelling of 720554228 in words is "seven hundred twenty million, five hundred fifty-four thousand, two hundred twenty-eight".