558145728 has 196 divisors, whose sum is σ = 1898934480. Its totient is φ = 159376896.

The previous prime is 558145699. The next prime is 558145769. The reversal of 558145728 is 827541855.

558145728 is a `hidden beast` number, since 5 + 581 + 45 + 7 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 325738 + ... + 327446.

Almost surely, 2^558145728 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 558145728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949467240).

558145728 is an abundant number, since it is smaller than the sum of its proper divisors (1340788752).

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

558145728 is an equidigital number, since it uses as much as digits as its factorization.

558145728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1721 counting only the distinct ones).

The product of its digits is 448000, while the sum is 45.

The square root of 558145728 is about 23625.1079997531. The cubic root of 558145728 is about 823.3462939857.

The spelling of 558145728 in words is "five hundred fifty-eight million, one hundred forty-five thousand, seven hundred twenty-eight".