3989012730 has 64 divisors (see below), whose sum is σ = 10018003968. Its totient is φ = 1015303680.

The previous prime is 3989012683. The next prime is 3989012743. The reversal of 3989012730 is 372109893.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 38512 + ... + 97268.

It is an arithmetic number, because the mean of its divisors is an integer number (156531312).

Almost surely, 2^3989012730 is an apocalyptic number.

3989012730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989012730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5009001984).

3989012730 is an abundant number, since it is smaller than the sum of its proper divisors (6028991238).

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

3989012730 is a wasteful number, since it uses less digits than its factorization.

3989012730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58871.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3989012730 is about 63158.6314766240. The cubic root of 3989012730 is about 1585.9462854983.

The spelling of 3989012730 in words is "three billion, nine hundred eighty-nine million, twelve thousand, seven hundred thirty".