400315340 has 12 divisors (see below), whose sum is σ = 840662256. Its totient is φ = 160126128.

The previous prime is 400315327. The next prime is 400315361. The reversal of 400315340 is 43513004.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20015767 = 400315340 / (4 + 0 + 0 + 3 + 1 + 5 + 3 + 4 + 0).

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 3 ways as a sum of consecutive naturals, for example, 10007864 + ... + 10007903.

It is an arithmetic number, because the mean of its divisors is an integer number (70055188).

Almost surely, 2^400315340 is an apocalyptic number.

It is an amenable number.

400315340 is an abundant number, since it is smaller than the sum of its proper divisors (440346916).

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

400315340 is a wasteful number, since it uses less digits than its factorization.

400315340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20015776 (or 20015774 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 400315340 is about 20007.8819468728. The cubic root of 400315340 is about 736.9998692856. Note that the first 3 decimals are identical.

Adding to 400315340 its reverse (43513004), we get a palindrome (443828344).

The spelling of 400315340 in words is "four hundred million, three hundred fifteen thousand, three hundred forty".