1982942685 has 24 divisors (see below), whose sum is σ = 3440319480. Its totient is φ = 1056579072.

The previous prime is 1982942681. The next prime is 1982942693. The reversal of 1982942685 is 5862492891.

It is a happy number.

1982942685 is a `hidden beast` number, since 1 + 98 + 294 + 268 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 520798041 + 1462144644 = 22821^2 + 38238^2 .

It is not a de Polignac number, because 1982942685 - 2² = 1982942681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982942681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29281 + ... + 69449.

It is an arithmetic number, because the mean of its divisors is an integer number (143346645).

Almost surely, 2^1982942685 is an apocalyptic number.

1982942685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1982942685 is a deficient number, since it is larger than the sum of its proper divisors (1457376795).

1982942685 is a wasteful number, since it uses less digits than its factorization.

1982942685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41277 (or 41274 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 1982942685 is about 44530.2446097032. The cubic root of 1982942685 is about 1256.3290069862.

The spelling of 1982942685 in words is "one billion, nine hundred eighty-two million, nine hundred forty-two thousand, six hundred eighty-five".