557340186 has 128 divisors (see below), whose sum is σ = 1341204480. Its totient is φ = 152748288.

The previous prime is 557340151. The next prime is 557340187. The reversal of 557340186 is 681043755.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (557340187) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2829040 + ... + 2829236.

It is an arithmetic number, because the mean of its divisors is an integer number (10478160).

Almost surely, 2^557340186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 557340186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670602240).

557340186 is an abundant number, since it is smaller than the sum of its proper divisors (783864294).

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

557340186 is a wasteful number, since it uses less digits than its factorization.

557340186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 557340186 is about 23608.0534140365. The cubic root of 557340186 is about 822.9500059937.

The spelling of 557340186 in words is "five hundred fifty-seven million, three hundred forty thousand, one hundred eighty-six".