400088 has 16 divisors (see below), whose sum is σ = 808080. Its totient is φ = 184608.

The previous prime is 400087. The next prime is 400093. The reversal of 400088 is 880004.

It is an Ulam number.

400088 is a modest number, since divided by 88 gives 40 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820 + ... + 2027.

It is an arithmetic number, because the mean of its divisors is an integer number (50505).

2⁴⁰⁰⁰⁸⁸ is an apocalyptic number.

It is an amenable number.

400088 is an abundant number, since it is smaller than the sum of its proper divisors (407992).

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

400088 is a wasteful number, since it uses less digits than its factorization.

400088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866 (or 3862 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 400088 is about 632.5250983163. The cubic root of 400088 is about 73.6860328228.

The spelling of 400088 in words is "four hundred thousand, eighty-eight".