728266572 has 144 divisors (see below), whose sum is σ = 2166474240. Its totient is φ = 211004640.

The previous prime is 728266541. The next prime is 728266577. The reversal of 728266572 is 275662827.

728266572 is a `hidden beast` number, since 72 + 8 + 2 + 6 + 6 + 572 = 666.

It is not an unprimeable number, because it can be changed into a prime (728266577) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299353 + ... + 301775.

It is an arithmetic number, because the mean of its divisors is an integer number (15044960).

Almost surely, 2^728266572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728266572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083237120).

728266572 is an abundant number, since it is smaller than the sum of its proper divisors (1438207668).

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

728266572 is a wasteful number, since it uses less digits than its factorization.

728266572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481 (or 2462 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 728266572 is about 26986.4145821560. The cubic root of 728266572 is about 899.6980765027.

The spelling of 728266572 in words is "seven hundred twenty-eight million, two hundred sixty-six thousand, five hundred seventy-two".