1986120330 has 32 divisors (see below), whose sum is σ = 4785697728. Its totient is φ = 527520000.

The previous prime is 1986120239. The next prime is 1986120337. The reversal of 1986120330 is 330216891.

It is a junction number, because it is equal to n+sod(n) for n = 1986120291 and 1986120300.

It is not an unprimeable number, because it can be changed into a prime (1986120337) 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, 124351 + ... + 139410.

It is an arithmetic number, because the mean of its divisors is an integer number (149553054).

Almost surely, 2^1986120330 is an apocalyptic number.

1986120330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1986120330 is an abundant number, since it is smaller than the sum of its proper divisors (2799577398).

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

1986120330 is a wasteful number, since it uses less digits than its factorization.

1986120330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264022.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1986120330 is about 44565.9099536855. The cubic root of 1986120330 is about 1256.9997335525. Note that the first 3 decimals are identical.

The spelling of 1986120330 in words is "one billion, nine hundred eighty-six million, one hundred twenty thousand, three hundred thirty".