450390 has 16 divisors (see below), whose sum is σ = 1081008. Its totient is φ = 120096.

The previous prime is 450383. The next prime is 450391. The reversal of 450390 is 93054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450391) 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, 7477 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (67563).

2⁴⁵⁰³⁹⁰ is an apocalyptic number.

450390 is an abundant number, since it is smaller than the sum of its proper divisors (630618).

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

450390 is a wasteful number, since it uses less digits than its factorization.

450390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15023.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 450390 is about 671.1110191317. Note that the first 3 decimals coincide. The cubic root of 450390 is about 76.6530746751.

The spelling of 450390 in words is "four hundred fifty thousand, three hundred ninety".