450990 has 24 divisors (see below), whose sum is σ = 1172808. Its totient is φ = 120240.

The previous prime is 450971. The next prime is 450991. The reversal of 450990 is 99054.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450991) 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 11 ways as a sum of consecutive naturals, for example, 2416 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (48867).

2⁴⁵⁰⁹⁹⁰ is an apocalyptic number.

450990 is an abundant number, since it is smaller than the sum of its proper divisors (721818).

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

450990 is a wasteful number, since it uses less digits than its factorization.

450990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024 (or 5021 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 450990 is about 671.5578902820. The cubic root of 450990 is about 76.6870981043.

The spelling of 450990 in words is "four hundred fifty thousand, nine hundred ninety".