1982355570 has 96 divisors (see below), whose sum is σ = 5571139392. Its totient is φ = 486158976.

The previous prime is 1982355569. The next prime is 1982355607. The reversal of 1982355570 is 755532891.

1982355570 is a `hidden beast` number, since 1 + 9 + 8 + 23 + 55 + 570 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 328117 + ... + 334103.

It is an arithmetic number, because the mean of its divisors is an integer number (58032702).

Almost surely, 2^1982355570 is an apocalyptic number.

1982355570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1982355570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2785569696).

1982355570 is an abundant number, since it is smaller than the sum of its proper divisors (3588783822).

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

1982355570 is a wasteful number, since it uses less digits than its factorization.

1982355570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296 (or 6293 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 1982355570 is about 44523.6518044062. The cubic root of 1982355570 is about 1256.2050023238.

The spelling of 1982355570 in words is "one billion, nine hundred eighty-two million, three hundred fifty-five thousand, five hundred seventy".