389473878986 has 8 divisors (see below), whose sum is σ = 584250344580. Its totient is φ = 194723764128.

The previous prime is 389473878949. The next prime is 389473879001. The reversal of 389473878986 is 689878374983.

It can be written as a sum of positive squares in 2 ways, for example, as 363723579025 + 25750299961 = 603095^2 + 160469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 389473878986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6550691 + ... + 6609878.

Almost surely, 2^389473878986 is an apocalyptic number.

389473878986 is a deficient number, since it is larger than the sum of its proper divisors (194776465594).

389473878986 is a wasteful number, since it uses less digits than its factorization.

389473878986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13175368.

The product of its digits is 3511517184, while the sum is 80.

The spelling of 389473878986 in words is "three hundred eighty-nine billion, four hundred seventy-three million, eight hundred seventy-eight thousand, nine hundred eighty-six".