450249678 has 40 divisors (see below), whose sum is σ = 1016307072. Its totient is φ = 148980384.

The previous prime is 450249661. The next prime is 450249691. The reversal of 450249678 is 876942054.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12051 + ... + 32337.

Almost surely, 2^450249678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 450249678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508153536).

450249678 is an abundant number, since it is smaller than the sum of its proper divisors (566057394).

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

450249678 is a wasteful number, since it uses less digits than its factorization.

450249678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20438 (or 20429 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 450249678 is about 21219.0875864162. The cubic root of 450249678 is about 766.4511325650.

The spelling of 450249678 in words is "four hundred fifty million, two hundred forty-nine thousand, six hundred seventy-eight".