104431440 has 40 divisors (see below), whose sum is σ = 323738208. Its totient is φ = 27848320.

The previous prime is 104431423. The next prime is 104431441. The reversal of 104431440 is 44134401.

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 (104431441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217326 + ... + 217805.

Almost surely, 2^104431440 is an apocalyptic number.

104431440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

104431440 is an abundant number, since it is smaller than the sum of its proper divisors (219306768).

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

104431440 is a wasteful number, since it uses less digits than its factorization.

104431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435147 (or 435141 counting only the distinct ones).

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

The square root of 104431440 is about 10219.1702207175. The cubic root of 104431440 is about 470.9163351377.

Adding to 104431440 its reverse (44134401), we get a palindrome (148565841).

The spelling of 104431440 in words is "one hundred four million, four hundred thirty-one thousand, four hundred forty".