40798 has 4 divisors (see below), whose sum is σ = 61200. Its totient is φ = 20398.

The previous prime is 40787. The next prime is 40801. The reversal of 40798 is 89704.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198 + ... + 10201.

It is an arithmetic number, because the mean of its divisors is an integer number (15300).

2⁴⁰⁷⁹⁸ is an apocalyptic number.

40798 is a deficient number, since it is larger than the sum of its proper divisors (20402).

40798 is a wasteful number, since it uses less digits than its factorization.

40798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20401.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 40798 is about 201.9851479689. The cubic root of 40798 is about 34.4254498888.

It can be divided in two parts, 407 and 98, that added together give a palindrome (505).

The spelling of 40798 in words is "forty thousand, seven hundred ninety-eight".