450806538 has 64 divisors (see below), whose sum is σ = 1122266880. Its totient is φ = 117545472.

The previous prime is 450806533. The next prime is 450806549. The reversal of 450806538 is 835608054.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 450806496 and 450806505.

It is not an unprimeable number, because it can be changed into a prime (450806533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43956 + ... + 53232.

It is an arithmetic number, because the mean of its divisors is an integer number (17535420).

Almost surely, 2^450806538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 450806538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561133440).

450806538 is an abundant number, since it is smaller than the sum of its proper divisors (671460342).

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

450806538 is a wasteful number, since it uses less digits than its factorization.

450806538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 450806538 is about 21232.2052081266. The cubic root of 450806538 is about 766.7669796488.

The spelling of 450806538 in words is "four hundred fifty million, eight hundred six thousand, five hundred thirty-eight".