555400 has 24 divisors (see below), whose sum is σ = 1291770. Its totient is φ = 222080.

The previous prime is 555391. The next prime is 555419. The reversal of 555400 is 4555.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 311364 + 244036 = 558^2 + 494^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189 + ... + 1588.

2⁵⁵⁵⁴⁰⁰ is an apocalyptic number.

555400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

555400 is an abundant number, since it is smaller than the sum of its proper divisors (736370).

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

555400 is a wasteful number, since it uses less digits than its factorization.

555400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 555400 is about 745.2516353555. The cubic root of 555400 is about 82.1993957683.

Adding to 555400 its reverse (4555), we get a palindrome (559955).

The spelling of 555400 in words is "five hundred fifty-five thousand, four hundred".