400441401 has 24 divisors (see below), whose sum is σ = 605483424. Its totient is φ = 264448800.

The previous prime is 400441399. The next prime is 400441403. The reversal of 400441401 is 104144004.

It is an interprime number because it is at equal distance from previous prime (400441399) and next prime (400441403).

It is not a de Polignac number, because 400441401 - 2¹ = 400441399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400441403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18301 + ... + 33701.

It is an arithmetic number, because the mean of its divisors is an integer number (25228476).

Almost surely, 2^400441401 is an apocalyptic number.

It is an amenable number.

400441401 is a deficient number, since it is larger than the sum of its proper divisors (205042023).

400441401 is a wasteful number, since it uses less digits than its factorization.

400441401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15523 (or 15511 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 400441401 is about 20011.0319823841. The cubic root of 400441401 is about 737.0772226291.

Adding to 400441401 its reverse (104144004), we get a palindrome (504585405).

The spelling of 400441401 in words is "four hundred million, four hundred forty-one thousand, four hundred one".