104143440 has 40 divisors (see below), whose sum is σ = 322845408. Its totient is φ = 27771520.

The previous prime is 104143397. The next prime is 104143441. The reversal of 104143440 is 44341401.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104143441) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 216726 + ... + 217205.

Almost surely, 2^104143440 is an apocalyptic number.

104143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104143440 is an abundant number, since it is smaller than the sum of its proper divisors (218701968).

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

104143440 is a wasteful number, since it uses less digits than its factorization.

104143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433947 (or 433941 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 104143440 is about 10205.0693285249. The cubic root of 104143440 is about 470.4830404327.

Adding to 104143440 its reverse (44341401), we get a palindrome (148484841).

The spelling of 104143440 in words is "one hundred four million, one hundred forty-three thousand, four hundred forty".