405055250 has 32 divisors (see below), whose sum is σ = 770722992. Its totient is φ = 159360000.

The previous prime is 405055249. The next prime is 405055253. The reversal of 405055250 is 52550504.

It can be written as a sum of positive squares in 8 ways, for example, as 2531281 + 402523969 = 1591^2 + 20063^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405055253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970 + ... + 28530.

Almost surely, 2^405055250 is an apocalyptic number.

405055250 is a deficient number, since it is larger than the sum of its proper divisors (365667742).

405055250 is a wasteful number, since it uses less digits than its factorization.

405055250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26639 (or 26629 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 405055250 is about 20125.9844479717. The cubic root of 405055250 is about 739.8972647736.

The spelling of 405055250 in words is "four hundred five million, fifty-five thousand, two hundred fifty".