400441365 has 12 divisors (see below), whose sum is σ = 694098444.
Its totient is φ = 213568704.
The previous prime is 400441357. The next prime is 400441369. The reversal of 400441365 is 563144004.
It can be written as a sum of positive squares in 2 ways, for example, as 243640881 + 156800484 = 15609^2 + 12522^2
It is not a de Polignac number, because 400441365 - 23 = 400441357 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (400441369) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4449304 + ... + 4449393.
It is an arithmetic number, because the mean of its divisors is an integer number (57841537).
Almost surely, 2400441365 is an apocalyptic number.
400441365 is a gapful number since it is divisible by the number (45) formed by its first and last digit.
It is an amenable number.
400441365 is a deficient number, since it is larger than the sum of its proper divisors (293657079).
400441365 is a wasteful number, since it uses less digits than its factorization.
400441365 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8898708 (or 8898705 counting only the distinct ones).
The product of its (nonzero) digits is 5760, while the sum is 27.
The square root of 400441365 is about 20011.0310828803.
The cubic root of 400441365 is about 737.0772005411.
Adding to 400441365 its reverse (563144004), we get a palindrome (963585369).
It can be divided in two parts, 4004 and 41365, that added together give a square (45369 = 2132).
The spelling of 400441365 in words is "four hundred million, four hundred forty-one thousand, three hundred sixty-five".