90398 has 16 divisors (see below), whose sum is σ = 169344. Its totient is φ = 35160.

The previous prime is 90397. The next prime is 90401. The reversal of 90398 is 89309.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 447.

It is an arithmetic number, because the mean of its divisors is an integer number (10584).

2⁹⁰³⁹⁸ is an apocalyptic number.

90398 is a deficient number, since it is larger than the sum of its proper divisors (78946).

90398 is a wasteful number, since it uses less digits than its factorization.

90398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 90398 is about 300.6626015985. The cubic root of 90398 is about 44.8800095534.

Subtracting from 90398 its reverse (89309), we obtain a square (1089 = 33²).

It can be divided in two parts, 903 and 98, that added together give a palindrome (1001).

The spelling of 90398 in words is "ninety thousand, three hundred ninety-eight".