401440403 has 12 divisors (see below), whose sum is σ = 496796688. Its totient is φ = 317622240.

The previous prime is 401440387. The next prime is 401440411. The reversal of 401440403 is 304044104.

It is not a de Polignac number, because 401440403 - 2⁴ = 401440387 is a prime.

It is a super-2 number, since 2×401440403² = 322308794321604818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401440423) 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, 168488 + ... + 170853.

It is an arithmetic number, because the mean of its divisors is an integer number (41399724).

Almost surely, 2^401440403 is an apocalyptic number.

401440403 is a deficient number, since it is larger than the sum of its proper divisors (95356285).

401440403 is a wasteful number, since it uses less digits than its factorization.

401440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339374 (or 339361 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 401440403 is about 20035.9777151004. The cubic root of 401440403 is about 737.6896552555.

Adding to 401440403 its reverse (304044104), we get a palindrome (705484507).

The spelling of 401440403 in words is "four hundred one million, four hundred forty thousand, four hundred three".