400403043 has 12 divisors (see below), whose sum is σ = 578552728. Its totient is φ = 266846400.

The previous prime is 400403033. The next prime is 400403051. The reversal of 400403043 is 340304004.

It is not a de Polignac number, because 400403043 - 2⁴ = 400403027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400403033) 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, 32268 + ... + 42918.

Almost surely, 2^400403043 is an apocalyptic number.

400403043 is a deficient number, since it is larger than the sum of its proper divisors (178149685).

400403043 is a wasteful number, since it uses less digits than its factorization.

400403043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14834 (or 14831 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400403043 is about 20010.0735380958. The cubic root of 400403043 is about 737.0536871747.

Adding to 400403043 its reverse (340304004), we get a palindrome (740707047).

The spelling of 400403043 in words is "four hundred million, four hundred three thousand, forty-three".