557720020 has 96 divisors (see below), whose sum is σ = 1457035776. Its totient is φ = 176179200.

The previous prime is 557720017. The next prime is 557720057. The reversal of 557720020 is 20027755.

It is a super-2 number, since 2×557720020² = 622103241417600800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42885 + ... + 54355.

It is an arithmetic number, because the mean of its divisors is an integer number (15177456).

Almost surely, 2^557720020 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 557720020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728517888).

557720020 is an abundant number, since it is smaller than the sum of its proper divisors (899315756).

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

557720020 is a wasteful number, since it uses less digits than its factorization.

557720020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521 (or 11519 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 557720020 is about 23616.0966292061. The cubic root of 557720020 is about 823.1369136295.

Adding to 557720020 its reverse (20027755), we get a palindrome (577747775).

The spelling of 557720020 in words is "five hundred fifty-seven million, seven hundred twenty thousand, twenty".