1986515146 has 16 divisors (see below), whose sum is σ = 3715041600. Its totient is φ = 773966880.

The previous prime is 1986515117. The next prime is 1986515147. The reversal of 1986515146 is 6415156891.

It is a junction number, because it is equal to n+sod(n) for n = 1986515096 and 1986515105.

It is not an unprimeable number, because it can be changed into a prime (1986515147) 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 7 ways as a sum of consecutive naturals, for example, 6449571 + ... + 6449878.

It is an arithmetic number, because the mean of its divisors is an integer number (232190100).

Almost surely, 2^1986515146 is an apocalyptic number.

1986515146 is a deficient number, since it is larger than the sum of its proper divisors (1728526454).

1986515146 is a wasteful number, since it uses less digits than its factorization.

1986515146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12899469.

The product of its digits is 259200, while the sum is 46.

The square root of 1986515146 is about 44570.3393076606. The cubic root of 1986515146 is about 1257.0830200010.

The spelling of 1986515146 in words is "one billion, nine hundred eighty-six million, five hundred fifteen thousand, one hundred forty-six".