1989536706 has 24 divisors (see below), whose sum is σ = 4459307580. Its totient is φ = 640310496.

The previous prime is 1989536701. The next prime is 1989536749. The reversal of 1989536706 is 6076359891.

1989536706 is a `hidden beast` number, since 198 + 95 + 367 + 0 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1919228481 + 70308225 = 43809^2 + 8385^2 .

It is not an unprimeable number, because it can be changed into a prime (1989536701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1905165 + ... + 1906208.

Almost surely, 2^1989536706 is an apocalyptic number.

1989536706 is an abundant number, since it is smaller than the sum of its proper divisors (2469770874).

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

1989536706 is a wasteful number, since it uses less digits than its factorization.

1989536706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811410 (or 3811407 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1989536706 is about 44604.2229615089. Note that the first 3 decimals coincide. The cubic root of 1989536706 is about 1257.7200530811.

The spelling of 1989536706 in words is "one billion, nine hundred eighty-nine million, five hundred thirty-six thousand, seven hundred six".