1981962048 has 112 divisors (see below), whose sum is σ = 6021872640. Its totient is φ = 568972800.

The previous prime is 1981962019. The next prime is 1981962061. The reversal of 1981962048 is 8402691891.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1981961988 and 1981962006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15433 + ... + 64823.

It is an arithmetic number, because the mean of its divisors is an integer number (53766720).

Almost surely, 2^1981962048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981962048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3010936320).

1981962048 is an abundant number, since it is smaller than the sum of its proper divisors (4039910592).

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

1981962048 is a wasteful number, since it uses less digits than its factorization.

1981962048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49436 (or 49426 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 1981962048 is about 44519.2323383951. The cubic root of 1981962048 is about 1256.1218727670.

The spelling of 1981962048 in words is "one billion, nine hundred eighty-one million, nine hundred sixty-two thousand, forty-eight".