400800088 has 16 divisors (see below), whose sum is σ = 809308080. Its totient is φ = 184984608.

The previous prime is 400800077. The next prime is 400800091. The reversal of 400800088 is 880008004.

It is a happy number.

It is a congruent number.

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, 1926820 + ... + 1927027.

It is an arithmetic number, because the mean of its divisors is an integer number (50581755).

Almost surely, 2^400800088 is an apocalyptic number.

It is an amenable number.

400800088 is an abundant number, since it is smaller than the sum of its proper divisors (408507992).

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

400800088 is a wasteful number, since it uses less digits than its factorization.

400800088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853866 (or 3853862 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 400800088 is about 20019.9922077907. The cubic root of 400800088 is about 737.2972307823.

The spelling of 400800088 in words is "four hundred million, eight hundred thousand, eighty-eight".