400002043 has 12 divisors (see below), whose sum is σ = 471203040. Its totient is φ = 338515632.

The previous prime is 400002023. The next prime is 400002047. The reversal of 400002043 is 340200004.

It is not a de Polignac number, because 400002043 - 2⁵ = 400002011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400002047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47796 + ... + 55537.

It is an arithmetic number, because the mean of its divisors is an integer number (39266920).

Almost surely, 2^400002043 is an apocalyptic number.

400002043 is a deficient number, since it is larger than the sum of its proper divisors (71200997).

400002043 is a wasteful number, since it uses less digits than its factorization.

400002043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103426 (or 103419 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 400002043 is about 20000.0510749348. The cubic root of 400002043 is about 736.8075541387.

Adding to 400002043 its reverse (340200004), we get a palindrome (740202047).

The spelling of 400002043 in words is "four hundred million, two thousand, forty-three".