1984399950 has 96 divisors (see below), whose sum is σ = 5324409216. Its totient is φ = 486207360.

The previous prime is 1984399933. The next prime is 1984399969. The reversal of 1984399950 is 599934891.

It is a congruent number.

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, 440409 + ... + 444891.

It is an arithmetic number, because the mean of its divisors is an integer number (55462596).

Almost surely, 2^1984399950 is an apocalyptic number.

1984399950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984399950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2662204608).

1984399950 is an abundant number, since it is smaller than the sum of its proper divisors (3340009266).

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

1984399950 is a wasteful number, since it uses less digits than its factorization.

1984399950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738 (or 4733 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 57.

The square root of 1984399950 is about 44546.6042476865. The cubic root of 1984399950 is about 1256.6366904442.

The spelling of 1984399950 in words is "one billion, nine hundred eighty-four million, three hundred ninety-nine thousand, nine hundred fifty".