398550 has 24 divisors (see below), whose sum is σ = 988776. Its totient is φ = 106240.

The previous prime is 398549. The next prime is 398557. The reversal of 398550 is 55893.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179 + ... + 1478.

It is an arithmetic number, because the mean of its divisors is an integer number (41199).

2³⁹⁸⁵⁵⁰ is an apocalyptic number.

398550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398550 is an abundant number, since it is smaller than the sum of its proper divisors (590226).

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

398550 is a wasteful number, since it uses less digits than its factorization.

398550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672 (or 2667 counting only the distinct ones).

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

The square root of 398550 is about 631.3081656370. The cubic root of 398550 is about 73.5914914156.

The spelling of 398550 in words is "three hundred ninety-eight thousand, five hundred fifty".