1984865120 has 48 divisors (see below), whose sum is σ = 5359138848. Its totient is φ = 680524800.

The previous prime is 1984865083. The next prime is 1984865123. The reversal of 1984865120 is 215684891.

It is a super-2 number, since 2×1984865120² = 7879379089185228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984865123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884981 + ... + 887220.

It is an arithmetic number, because the mean of its divisors is an integer number (111648726).

Almost surely, 2^1984865120 is an apocalyptic number.

1984865120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1984865120 is an abundant number, since it is smaller than the sum of its proper divisors (3374273728).

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

1984865120 is a wasteful number, since it uses less digits than its factorization.

1984865120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772223 (or 1772215 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1984865120 is about 44551.8251029068. The cubic root of 1984865120 is about 1256.7348736120.

The spelling of 1984865120 in words is "one billion, nine hundred eighty-four million, eight hundred sixty-five thousand, one hundred twenty".