400942243 has 8 divisors (see below), whose sum is σ = 431953200. Its totient is φ = 369955488.

The previous prime is 400942211. The next prime is 400942309. The reversal of 400942243 is 342249004.

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

It is a cyclic number.

It is not a de Polignac number, because 400942243 - 2⁵ = 400942211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400942543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43353 + ... + 51781.

It is an arithmetic number, because the mean of its divisors is an integer number (53994150).

Almost surely, 2^400942243 is an apocalyptic number.

400942243 is a deficient number, since it is larger than the sum of its proper divisors (31010957).

400942243 is a wasteful number, since it uses less digits than its factorization.

400942243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12101.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 400942243 is about 20023.5422190980. The cubic root of 400942243 is about 737.3843881975.

The spelling of 400942243 in words is "four hundred million, nine hundred forty-two thousand, two hundred forty-three".