389405012 has 12 divisors (see below), whose sum is σ = 703441536. Its totient is φ = 188421720.

The previous prime is 389404999. The next prime is 389405017. The reversal of 389405012 is 210504983.

It is a self number, because there is not a number n which added to its sum of digits gives 389405012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389405017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1570058 + ... + 1570305.

It is an arithmetic number, because the mean of its divisors is an integer number (58620128).

Almost surely, 2^389405012 is an apocalyptic number.

It is an amenable number.

389405012 is a deficient number, since it is larger than the sum of its proper divisors (314036524).

389405012 is a wasteful number, since it uses less digits than its factorization.

389405012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140398 (or 3140396 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 389405012 is about 19733.3477139587. The cubic root of 389405012 is about 730.2426240497.

Adding to 389405012 its reverse (210504983), we get a palindrome (599909995).

The spelling of 389405012 in words is "three hundred eighty-nine million, four hundred five thousand, twelve".