400843552 has 24 divisors (see below), whose sum is σ = 808411212. Its totient is φ = 195532800.

The previous prime is 400843537. The next prime is 400843559. The reversal of 400843552 is 255348004.

It can be written as a sum of positive squares in 2 ways, for example, as 393466896 + 7376656 = 19836^2 + 2716^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (400843559) 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 3 ways as a sum of consecutive naturals, for example, 151449 + ... + 154072.

Almost surely, 2^400843552 is an apocalyptic number.

It is an amenable number.

400843552 is an abundant number, since it is smaller than the sum of its proper divisors (407567660).

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

400843552 is a wasteful number, since it uses less digits than its factorization.

400843552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305572 (or 305564 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 400843552 is about 20021.0776932712. The cubic root of 400843552 is about 737.3238814156.

The spelling of 400843552 in words is "four hundred million, eight hundred forty-three thousand, five hundred fifty-two".