440400101 has 4 divisors (see below), whose sum is σ = 441446604. Its totient is φ = 439353600.

The previous prime is 440400091. The next prime is 440400133. The reversal of 440400101 is 101004044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54316900 + 386083201 = 7370^2 + 19649^2 .

It is a cyclic number.

It is not a de Polignac number, because 440400101 - 2²² = 436205797 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 (440400901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522620 + ... + 523461.

It is an arithmetic number, because the mean of its divisors is an integer number (110361651).

Almost surely, 2^440400101 is an apocalyptic number.

It is an amenable number.

440400101 is a deficient number, since it is larger than the sum of its proper divisors (1046503).

440400101 is a wasteful number, since it uses less digits than its factorization.

440400101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046502.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 440400101 is about 20985.7118297188. The cubic root of 440400101 is about 760.8209624733.

Adding to 440400101 its reverse (101004044), we get a palindrome (541404145).

The spelling of 440400101 in words is "four hundred forty million, four hundred thousand, one hundred one".