1986122632 has 64 divisors (see below), whose sum is σ = 4180700160. Its totient is φ = 878342400.

The previous prime is 1986122629. The next prime is 1986122639. The reversal of 1986122632 is 2362216891.

It is not an unprimeable number, because it can be changed into a prime (1986122639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329082 + ... + 335062.

It is an arithmetic number, because the mean of its divisors is an integer number (65323440).

Almost surely, 2^1986122632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986122632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090350080).

1986122632 is an abundant number, since it is smaller than the sum of its proper divisors (2194577528).

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

1986122632 is a wasteful number, since it uses less digits than its factorization.

1986122632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134 (or 6130 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 1986122632 is about 44565.9357805937. The cubic root of 1986122632 is about 1257.0002191915. Note that the first 3 decimals are identical.

The spelling of 1986122632 in words is "one billion, nine hundred eighty-six million, one hundred twenty-two thousand, six hundred thirty-two".