400143426 has 16 divisors (see below), whose sum is σ = 804435744. Its totient is φ = 132689664.

The previous prime is 400143413. The next prime is 400143427. The reversal of 400143426 is 624341004.

It is a super-2 number, since 2×400143426² = 320229522742034952, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400143396 and 400143405.

It is not an unprimeable number, because it can be changed into a prime (400143427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171616 + ... + 173931.

It is an arithmetic number, because the mean of its divisors is an integer number (50277234).

Almost surely, 2^400143426 is an apocalyptic number.

400143426 is an abundant number, since it is smaller than the sum of its proper divisors (404292318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400143426 is a wasteful number, since it uses less digits than its factorization.

400143426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345745.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 400143426 is about 20003.5853286355. The cubic root of 400143426 is about 736.8943535215.

The spelling of 400143426 in words is "four hundred million, one hundred forty-three thousand, four hundred twenty-six".