1984636830 has 128 divisors (see below), whose sum is σ = 5560358400. Its totient is φ = 448243200.

The previous prime is 1984636807. The next prime is 1984636847. The reversal of 1984636830 is 386364891.

It is a self number, because there is not a number n which added to its sum of digits gives 1984636830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379876 + ... + 385064.

It is an arithmetic number, because the mean of its divisors is an integer number (43440300).

Almost surely, 2^1984636830 is an apocalyptic number.

1984636830 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 1984636830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2780179200).

1984636830 is an abundant number, since it is smaller than the sum of its proper divisors (3575721570).

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

1984636830 is a wasteful number, since it uses less digits than its factorization.

1984636830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1984636830 is about 44549.2629568661. The cubic root of 1984636830 is about 1256.6866904884.

The spelling of 1984636830 in words is "one billion, nine hundred eighty-four million, six hundred thirty-six thousand, eight hundred thirty".