389644706 has 16 divisors (see below), whose sum is σ = 654834240. Its totient is φ = 172324080.

The previous prime is 389644699. The next prime is 389644729. The reversal of 389644706 is 607446983.

389644706 = T₄₈₄₃ + T₄₈₄₄ + ... + T₄₈₇₅.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238526 + ... + 240153.

It is an arithmetic number, because the mean of its divisors is an integer number (40927140).

Almost surely, 2^389644706 is an apocalyptic number.

389644706 is a deficient number, since it is larger than the sum of its proper divisors (265189534).

389644706 is a wasteful number, since it uses less digits than its factorization.

389644706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478729.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 389644706 is about 19739.4201029311. The cubic root of 389644706 is about 730.3924242738.

The spelling of 389644706 in words is "three hundred eighty-nine million, six hundred forty-four thousand, seven hundred six".