400140455 has 24 divisors (see below), whose sum is σ = 567226800. Its totient is φ = 268619520.

The previous prime is 400140439. The next prime is 400140473. The reversal of 400140455 is 554041004.

It is not a de Polignac number, because 400140455 - 2⁴ = 400140439 is a prime.

It is a super-2 number, since 2×400140455² = 320224767455214050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400140455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12230 + ... + 30819.

It is an arithmetic number, because the mean of its divisors is an integer number (23634450).

Almost surely, 2^400140455 is an apocalyptic number.

400140455 is a deficient number, since it is larger than the sum of its proper divisors (167086345).

400140455 is a wasteful number, since it uses less digits than its factorization.

400140455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43091 (or 43078 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 400140455 is about 20003.5110668102. The cubic root of 400140455 is about 736.8925297434.

Adding to 400140455 its reverse (554041004), we get a palindrome (954181459).

The spelling of 400140455 in words is "four hundred million, one hundred forty thousand, four hundred fifty-five".