401440365 has 24 divisors (see below), whose sum is σ = 700274328. Its totient is φ = 212734080.

The previous prime is 401440339. The next prime is 401440387. The reversal of 401440365 is 563044104.

It can be written as a sum of positive squares in 4 ways, for example, as 9162729 + 392277636 = 3027^2 + 19806^2 .

It is not a de Polignac number, because 401440365 - 2¹⁸ = 401178221 is a prime.

It is a super-2 number, since 2×401440365² = 322308733302666450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21346 + ... + 35475.

It is an arithmetic number, because the mean of its divisors is an integer number (29178097).

Almost surely, 2^401440365 is an apocalyptic number.

401440365 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401440365 is a deficient number, since it is larger than the sum of its proper divisors (298833963).

401440365 is a wasteful number, since it uses less digits than its factorization.

401440365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56989 (or 56986 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 401440365 is about 20035.9767668063. The cubic root of 401440365 is about 737.6896319792.

Adding to 401440365 its reverse (563044104), we get a palindrome (964484469).

The spelling of 401440365 in words is "four hundred one million, four hundred forty thousand, three hundred sixty-five".