1982544140 has 24 divisors (see below), whose sum is σ = 4176742752. Its totient is φ = 790465280.

The previous prime is 1982544119. The next prime is 1982544143. The reversal of 1982544140 is 414452891.

It is a junction number, because it is equal to n+sod(n) for n = 1982544094 and 1982544103.

It is not an unprimeable number, because it can be changed into a prime (1982544143) 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, 153149 + ... + 165588.

It is an arithmetic number, because the mean of its divisors is an integer number (174030948).

Almost surely, 2^1982544140 is an apocalyptic number.

1982544140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982544140 is an abundant number, since it is smaller than the sum of its proper divisors (2194198612).

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

1982544140 is a wasteful number, since it uses less digits than its factorization.

1982544140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319057 (or 319055 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1982544140 is about 44525.7693925664. The cubic root of 1982544140 is about 1256.2448328954.

The spelling of 1982544140 in words is "one billion, nine hundred eighty-two million, five hundred forty-four thousand, one hundred forty".