400843026 has 16 divisors (see below), whose sum is σ = 890762400. Its totient is φ = 133614324.

The previous prime is 400843021. The next prime is 400843039. The reversal of 400843026 is 620348004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (400843021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711456 + ... + 3711563.

It is an arithmetic number, because the mean of its divisors is an integer number (55672650).

Almost surely, 2^400843026 is an apocalyptic number.

400843026 is an abundant number, since it is smaller than the sum of its proper divisors (489919374).

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

400843026 is a wasteful number, since it uses less digits than its factorization.

400843026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7423030 (or 7423024 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 400843026 is about 20021.0645571108. The cubic root of 400843026 is about 737.3235589020.

The spelling of 400843026 in words is "four hundred million, eight hundred forty-three thousand, twenty-six".