104840 has 16 divisors (see below), whose sum is σ = 235980. Its totient is φ = 41920.

The previous prime is 104831. The next prime is 104849. The reversal of 104840 is 48401.

It is a happy number.

104840 is nontrivially palindromic in base 6.

It is an interprime number because it is at equal distance from previous prime (104831) and next prime (104849).

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 1156 = 322^2 + 34^2 .

It is not an unprimeable number, because it can be changed into a prime (104849) 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 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 1350.

2¹⁰⁴⁸⁴⁰ is an apocalyptic number.

104840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104840 is an abundant number, since it is smaller than the sum of its proper divisors (131140).

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

104840 is a wasteful number, since it uses less digits than its factorization.

104840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 104840 is about 323.7900554372. The cubic root of 104840 is about 47.1529647312.

It can be divided in two parts, 10 and 4840, that multiplied together give a square (48400 = 220²).

The spelling of 104840 in words is "one hundred four thousand, eight hundred forty".