400242808 has 16 divisors (see below), whose sum is σ = 857663280. Its totient is φ = 171532608.

The previous prime is 400242797. The next prime is 400242811. The reversal of 400242808 is 808242004.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 3573541 + ... + 3573652.

It is an arithmetic number, because the mean of its divisors is an integer number (53603955).

Almost surely, 2^400242808 is an apocalyptic number.

It is an amenable number.

400242808 is an abundant number, since it is smaller than the sum of its proper divisors (457420472).

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

400242808 is a wasteful number, since it uses less digits than its factorization.

400242808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147206 (or 7147202 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 400242808 is about 20006.0692790963. The cubic root of 400242808 is about 736.9553549590.

The spelling of 400242808 in words is "four hundred million, two hundred forty-two thousand, eight hundred eight".