389666706 has 192 divisors, whose sum is σ = 1013523840. Its totient is φ = 98841600.

The previous prime is 389666701. The next prime is 389666723. The reversal of 389666706 is 607666983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389666701) 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 95 ways as a sum of consecutive naturals, for example, 7352176 + ... + 7352228.

It is an arithmetic number, because the mean of its divisors is an integer number (5278770).

Almost surely, 2^389666706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389666706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506761920).

389666706 is an abundant number, since it is smaller than the sum of its proper divisors (623857134).

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

389666706 is a wasteful number, since it uses less digits than its factorization.

389666706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 389666706 is about 19739.9773556101. The cubic root of 389666706 is about 730.4061704129.

The spelling of 389666706 in words is "three hundred eighty-nine million, six hundred sixty-six thousand, seven hundred six".