400240068 has 12 divisors (see below), whose sum is σ = 933893520. Its totient is φ = 133413352.

The previous prime is 400240033. The next prime is 400240081. The reversal of 400240068 is 860042004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×400240068² = 320384224065289248, which contains 22 as substring.

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, 16676658 + ... + 16676681.

It is an arithmetic number, because the mean of its divisors is an integer number (77824460).

Almost surely, 2^400240068 is an apocalyptic number.

It is an amenable number.

400240068 is an abundant number, since it is smaller than the sum of its proper divisors (533653452).

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

400240068 is a wasteful number, since it uses less digits than its factorization.

400240068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33353346 (or 33353344 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 400240068 is about 20006.0007997601. Note that the first 3 decimals coincide. The cubic root of 400240068 is about 736.9536732613.

The spelling of 400240068 in words is "four hundred million, two hundred forty thousand, sixty-eight".