440120261 has 8 divisors (see below), whose sum is σ = 505549440. Its totient is φ = 375329808.

The previous prime is 440120251. The next prime is 440120311. The reversal of 440120261 is 162021044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-440120261 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 (440120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158201 + ... + 160958.

It is an arithmetic number, because the mean of its divisors is an integer number (63193680).

Almost surely, 2^440120261 is an apocalyptic number.

It is an amenable number.

440120261 is a deficient number, since it is larger than the sum of its proper divisors (65429179).

440120261 is a wasteful number, since it uses less digits than its factorization.

440120261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319363.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 440120261 is about 20979.0433766652. The cubic root of 440120261 is about 760.6597808197.

The spelling of 440120261 in words is "four hundred forty million, one hundred twenty thousand, two hundred sixty-one".