1985592642 has 64 divisors (see below), whose sum is σ = 4460227200. Its totient is φ = 583994880.

The previous prime is 1985592629. The next prime is 1985592647. The reversal of 1985592642 is 2462955891.

It is not an unprimeable number, because it can be changed into a prime (1985592647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1388784 + ... + 1390212.

It is an arithmetic number, because the mean of its divisors is an integer number (69691050).

Almost surely, 2^1985592642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985592642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230113600).

1985592642 is an abundant number, since it is smaller than the sum of its proper divisors (2474634558).

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

1985592642 is a wasteful number, since it uses less digits than its factorization.

1985592642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051.

The product of its digits is 1555200, while the sum is 51.

The square root of 1985592642 is about 44559.9892504475. The cubic root of 1985592642 is about 1256.8884005149. Note that the first 3 decimals are identical.

It can be divided in two parts, 198 and 5592642, that added together give a triangular number (5592840 = T₃₃₄₄).

The spelling of 1985592642 in words is "one billion, nine hundred eighty-five million, five hundred ninety-two thousand, six hundred forty-two".