557844 has 48 divisors (see below), whose sum is σ = 1545600. Its totient is φ = 153216.

The previous prime is 557831. The next prime is 557857. The reversal of 557844 is 448755.

It is an interprime number because it is at equal distance from previous prime (557831) and next prime (557857).

It is a super-2 number, since 2×557844² = 622379856672, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

557844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2322 + ... + 2550.

It is an arithmetic number, because the mean of its divisors is an integer number (32200).

2⁵⁵⁷⁸⁴⁴ 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 557844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772800).

557844 is an abundant number, since it is smaller than the sum of its proper divisors (987756).

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

557844 is a wasteful number, since it uses less digits than its factorization.

557844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 270 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 557844 is about 746.8895500675. The cubic root of 557844 is about 82.3197902985.

The spelling of 557844 in words is "five hundred fifty-seven thousand, eight hundred forty-four".