550398 has 8 divisors (see below), whose sum is σ = 1100808. Its totient is φ = 183464.

The previous prime is 550379. The next prime is 550427. The reversal of 550398 is 893055.

It is a sphenic number, since it is the product of 3 distinct primes.

550398 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45861 + ... + 45872.

It is an arithmetic number, because the mean of its divisors is an integer number (137601).

2⁵⁵⁰³⁹⁸ is an apocalyptic number.

550398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

550398 is a wasteful number, since it uses less digits than its factorization.

550398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91738.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 550398 is about 741.8881317288. Note that the first 3 decimals coincide. The cubic root of 550398 is about 81.9518853171.

It can be divided in two parts, 5 and 50398, that added together give a triangular number (50403 = T₃₁₇).

The spelling of 550398 in words is "five hundred fifty thousand, three hundred ninety-eight".