400403140 has 12 divisors (see below), whose sum is σ = 840846636. Its totient is φ = 160161248.

The previous prime is 400403123. The next prime is 400403149. The reversal of 400403140 is 41304004.

It can be written as a sum of positive squares in 2 ways, for example, as 316057284 + 84345856 = 17778^2 + 9184^2 .

It is not an unprimeable number, because it can be changed into a prime (400403149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10010059 + ... + 10010098.

It is an arithmetic number, because the mean of its divisors is an integer number (70070553).

Almost surely, 2^400403140 is an apocalyptic number.

It is an amenable number.

400403140 is an abundant number, since it is smaller than the sum of its proper divisors (440443496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400403140 is a wasteful number, since it uses less digits than its factorization.

400403140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20020166 (or 20020164 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400403140 is about 20010.0759618748. The cubic root of 400403140 is about 737.0537466933.

Adding to 400403140 its reverse (41304004), we get a palindrome (441707144).

The spelling of 400403140 in words is "four hundred million, four hundred three thousand, one hundred forty".