40098 has 16 divisors (see below), whose sum is σ = 82656. Its totient is φ = 12960.

The previous prime is 40093. The next prime is 40099. The reversal of 40098 is 89004.

It is not an unprimeable number, because it can be changed into a prime (40093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165 + ... + 327.

It is an arithmetic number, because the mean of its divisors is an integer number (5166).

2⁴⁰⁰⁹⁸ is an apocalyptic number.

40098 is an abundant number, since it is smaller than the sum of its proper divisors (42558).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41328).

40098 is a wasteful number, since it uses less digits than its factorization.

40098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 40098 is about 200.2448501210. The cubic root of 40098 is about 34.2274257625.

The spelling of 40098 in words is "forty thousand, ninety-eight".