440129871 has 6 divisors (see below), whose sum is σ = 635743160. Its totient is φ = 293419908.

The previous prime is 440129869. The next prime is 440129891. The reversal of 440129871 is 178921044.

It is not a de Polignac number, because 440129871 - 2¹ = 440129869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440129801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24451651 + ... + 24451668.

Almost surely, 2^440129871 is an apocalyptic number.

440129871 is a deficient number, since it is larger than the sum of its proper divisors (195613289).

440129871 is a wasteful number, since it uses less digits than its factorization.

440129871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48903325 (or 48903322 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 440129871 is about 20979.2724135038. The cubic root of 440129871 is about 760.6653170999.

The spelling of 440129871 in words is "four hundred forty million, one hundred twenty-nine thousand, eight hundred seventy-one".