98405 has 4 divisors (see below), whose sum is σ = 118092. Its totient is φ = 78720.

The previous prime is 98389. The next prime is 98407. The reversal of 98405 is 50489.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50489 = 29 ⋅1741.

It can be written as a sum of positive squares in 2 ways, for example, as 73441 + 24964 = 271^2 + 158^2 .

It is not a de Polignac number, because 98405 - 2⁴ = 98389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 98405.

It is not an unprimeable number, because it can be changed into a prime (98407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9836 + ... + 9845.

It is an arithmetic number, because the mean of its divisors is an integer number (29523).

2⁹⁸⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

98405 is a deficient number, since it is larger than the sum of its proper divisors (19687).

98405 is a wasteful number, since it uses less digits than its factorization.

98405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19686.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 98405 is about 313.6957124348. The cubic root of 98405 is about 46.1677867433.

The spelling of 98405 in words is "ninety-eight thousand, four hundred five".