405140450 has 48 divisors (see below), whose sum is σ = 885318336. Its totient is φ = 135988800.

The previous prime is 405140443. The next prime is 405140459. The reversal of 405140450 is 54041504.

It is not an unprimeable number, because it can be changed into a prime (405140459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21182 + ... + 35481.

It is an arithmetic number, because the mean of its divisors is an integer number (18444132).

Almost surely, 2^405140450 is an apocalyptic number.

405140450 is an abundant number, since it is smaller than the sum of its proper divisors (480177886).

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

405140450 is a wasteful number, since it uses less digits than its factorization.

405140450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56699 (or 56694 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 405140450 is about 20128.1010033237. The cubic root of 405140450 is about 739.9491382135.

Adding to 405140450 its reverse (54041504), we get a palindrome (459181954).

The spelling of 405140450 in words is "four hundred five million, one hundred forty thousand, four hundred fifty".