999998450 has 72 divisors (see below), whose sum is σ = 2075815056. Its totient is φ = 358063200.

The previous prime is 999998423. The next prime is 999998459. The reversal of 999998450 is 54899999.

It is not an unprimeable number, because it can be changed into a prime (999998459) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 404117 + ... + 406583.

Almost surely, 2^999998450 is an apocalyptic number.

999998450 is an abundant number, since it is smaller than the sum of its proper divisors (1075816606).

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

999998450 is a wasteful number, since it uses less digits than its factorization.

999998450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568 (or 2552 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 62.

The square root of 999998450 is about 31622.7520940224. The cubic root of 999998450 is about 999.9994833331. Note that the first 3 decimals are identical.

The spelling of 999998450 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, four hundred fifty".