400408728718 has 16 divisors (see below), whose sum is σ = 621516600000. Its totient is φ = 193240811232.

The previous prime is 400408728683. The next prime is 400408728773. The reversal of 400408728718 is 817827804004.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 881718 + ... + 1256281.

It is an arithmetic number, because the mean of its divisors is an integer number (38844787500).

Almost surely, 2^400408728718 is an apocalyptic number.

400408728718 is a deficient number, since it is larger than the sum of its proper divisors (221107871282).

400408728718 is a wasteful number, since it uses less digits than its factorization.

400408728718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141259.

The product of its (nonzero) digits is 802816, while the sum is 49.

The spelling of 400408728718 in words is "four hundred billion, four hundred eight million, seven hundred twenty-eight thousand, seven hundred eighteen".