400143340 has 12 divisors (see below), whose sum is σ = 840301056. Its totient is φ = 160057328.

The previous prime is 400143329. The next prime is 400143349. The reversal of 400143340 is 43341004.

It is a super-2 number, since 2×400143340² = 320229385092711200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400143349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10003564 + ... + 10003603.

It is an arithmetic number, because the mean of its divisors is an integer number (70025088).

Almost surely, 2^400143340 is an apocalyptic number.

It is an amenable number.

400143340 is an abundant number, since it is smaller than the sum of its proper divisors (440157716).

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

400143340 is a wasteful number, since it uses less digits than its factorization.

400143340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20007176 (or 20007174 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400143340 is about 20003.5831790207. The cubic root of 400143340 is about 736.8943007297.

Adding to 400143340 its reverse (43341004), we get a palindrome (443484344).

The spelling of 400143340 in words is "four hundred million, one hundred forty-three thousand, three hundred forty".