999784450 has 96 divisors (see below), whose sum is σ = 2271711744. Its totient is φ = 319549440.

The previous prime is 999784393. The next prime is 999784463. The reversal of 999784450 is 54487999.

It is a junction number, because it is equal to n+sod(n) for n = 999784391 and 999784400.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671607 + ... + 673093.

It is an arithmetic number, because the mean of its divisors is an integer number (23663664).

Almost surely, 2^999784450 is an apocalyptic number.

999784450 is an abundant number, since it is smaller than the sum of its proper divisors (1271927294).

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

999784450 is a wasteful number, since it uses less digits than its factorization.

999784450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 999784450 is about 31619.3682732594. The cubic root of 999784450 is about 999.9281448370.

The spelling of 999784450 in words is "nine hundred ninety-nine million, seven hundred eighty-four thousand, four hundred fifty".