400000007770 has 16 divisors (see below), whose sum is σ = 785454560928. Its totient is φ = 145454548240.

The previous prime is 400000007747. The next prime is 400000007789. The reversal of 400000007770 is 77700000004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818181744 + ... + 1818181963.

It is an arithmetic number, because the mean of its divisors is an integer number (49090910058).

Almost surely, 2^400000007770 is an apocalyptic number.

400000007770 is a deficient number, since it is larger than the sum of its proper divisors (385454553158).

400000007770 is a wasteful number, since it uses less digits than its factorization.

400000007770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636363725.

The product of its (nonzero) digits is 1372, while the sum is 25.

Adding to 400000007770 its reverse (77700000004), we get a palindrome (477700007774).

The spelling of 400000007770 in words is "four hundred billion, seven thousand, seven hundred seventy".