1986743642 has 48 divisors (see below), whose sum is σ = 3324204576. Its totient is φ = 885206400.

The previous prime is 1986743599. The next prime is 1986743653. The reversal of 1986743642 is 2463476891.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5725313 + ... + 5725659.

It is an arithmetic number, because the mean of its divisors is an integer number (69254262).

Almost surely, 2^1986743642 is an apocalyptic number.

1986743642 is a deficient number, since it is larger than the sum of its proper divisors (1337460934).

1986743642 is a wasteful number, since it uses less digits than its factorization.

1986743642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 534 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 1986743642 is about 44572.9025530086. The cubic root of 1986743642 is about 1257.1312161985.

The spelling of 1986743642 in words is "one billion, nine hundred eighty-six million, seven hundred forty-three thousand, six hundred forty-two".