400124043 has 56 divisors (see below), whose sum is σ = 670962096. Its totient is φ = 236390400.

The previous prime is 400124033. The next prime is 400124069. The reversal of 400124043 is 340421004.

It is not a de Polignac number, because 400124043 - 2⁴ = 400124027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400124033) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 328171 + ... + 329387.

It is an arithmetic number, because the mean of its divisors is an integer number (11981466).

Almost surely, 2^400124043 is an apocalyptic number.

400124043 is a deficient number, since it is larger than the sum of its proper divisors (270838053).

400124043 is a wasteful number, since it uses less digits than its factorization.

400124043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400124043 is about 20003.1008346206. The cubic root of 400124043 is about 736.8824549097.

Adding to 400124043 its reverse (340421004), we get a palindrome (740545047).

The spelling of 400124043 in words is "four hundred million, one hundred twenty-four thousand, forty-three".