400680308 has 12 divisors (see below), whose sum is σ = 801360672. Its totient is φ = 171720120.

The previous prime is 400680307. The next prime is 400680317. The reversal of 400680308 is 803086004.

400680308 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400680307) 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, 7154978 + ... + 7155033.

It is an arithmetic number, because the mean of its divisors is an integer number (66780056).

Almost surely, 2^400680308 is an apocalyptic number.

It is an amenable number.

400680308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400680308 is a wasteful number, since it uses less digits than its factorization.

400680308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14310022 (or 14310020 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 400680308 is about 20017.0004745966. Note that the first 3 decimals coincide. The cubic root of 400680308 is about 737.2237758240.

The spelling of 400680308 in words is "four hundred million, six hundred eighty thousand, three hundred eight".