1984889436 has 24 divisors (see below), whose sum is σ = 4633140624. Its totient is φ = 661382400.

The previous prime is 1984889411. The next prime is 1984889441. The reversal of 1984889436 is 6349884891.

It is a self number, because there is not a number n which added to its sum of digits gives 1984889436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4086 + ... + 63138.

It is an arithmetic number, because the mean of its divisors is an integer number (193047526).

Almost surely, 2^1984889436 is an apocalyptic number.

It is an amenable number.

1984889436 is an abundant number, since it is smaller than the sum of its proper divisors (2648251188).

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

1984889436 is a wasteful number, since it uses less digits than its factorization.

1984889436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61861 (or 61859 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

The square root of 1984889436 is about 44552.0979977374. The cubic root of 1984889436 is about 1256.7400055544.

The spelling of 1984889436 in words is "one billion, nine hundred eighty-four million, eight hundred eighty-nine thousand, four hundred thirty-six".