557223420 has 144 divisors (see below), whose sum is σ = 1704447360. Its totient is φ = 135952128.

The previous prime is 557223379. The next prime is 557223427. The reversal of 557223420 is 24322755.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557223427) 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, 1814907 + ... + 1815213.

It is an arithmetic number, because the mean of its divisors is an integer number (11836440).

Almost surely, 2^557223420 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 557223420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852223680).

557223420 is an abundant number, since it is smaller than the sum of its proper divisors (1147223940).

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

557223420 is a wasteful number, since it uses less digits than its factorization.

557223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 557223420 is about 23605.5802724695. The cubic root of 557223420 is about 822.8925310474.

The spelling of 557223420 in words is "five hundred fifty-seven million, two hundred twenty-three thousand, four hundred twenty".