1982749220 has 12 divisors (see below), whose sum is σ = 4163773404. Its totient is φ = 793099680.

The previous prime is 1982749213. The next prime is 1982749261. The reversal of 1982749220 is 229472891.

It can be written as a sum of positive squares in 2 ways, for example, as 199883044 + 1782866176 = 14138^2 + 42224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49568711 + ... + 49568750.

It is an arithmetic number, because the mean of its divisors is an integer number (346981117).

Almost surely, 2^1982749220 is an apocalyptic number.

1982749220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982749220 is an abundant number, since it is smaller than the sum of its proper divisors (2181024184).

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

1982749220 is a wasteful number, since it uses less digits than its factorization.

1982749220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99137470 (or 99137468 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1982749220 is about 44528.0722690754. The cubic root of 1982749220 is about 1256.2881479138.

The spelling of 1982749220 in words is "one billion, nine hundred eighty-two million, seven hundred forty-nine thousand, two hundred twenty".