400855042 has 8 divisors (see below), whose sum is σ = 687180096. Its totient is φ = 171795012.

The previous prime is 400855033. The next prime is 400855061. The reversal of 400855042 is 240558004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400855042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14316238 + ... + 14316265.

It is an arithmetic number, because the mean of its divisors is an integer number (85897512).

Almost surely, 2^400855042 is an apocalyptic number.

400855042 is a deficient number, since it is larger than the sum of its proper divisors (286325054).

400855042 is a wasteful number, since it uses less digits than its factorization.

400855042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28632512.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 400855042 is about 20021.3646388052. The cubic root of 400855042 is about 737.3309263674.

The spelling of 400855042 in words is "four hundred million, eight hundred fifty-five thousand, forty-two".