387878828121212 has 48 divisors (see below), whose sum is σ = 695015152634880. Its totient is φ = 189308816251968.

The previous prime is 387878828121209. The next prime is 387878828121221. The reversal of 387878828121212 is 212121828878783.

It is a happy number.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7732960589 + ... + 7733010747.

It is an arithmetic number, because the mean of its divisors is an integer number (14479482346560).

Almost surely, 2^{387878828121212} is an apocalyptic number.

It is an amenable number.

387878828121212 is a deficient number, since it is larger than the sum of its proper divisors (307136324513668).

387878828121212 is a wasteful number, since it uses less digits than its factorization.

387878828121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77882 (or 77880 counting only the distinct ones).

The product of its digits is 77070336, while the sum is 68.

The spelling of 387878828121212 in words is "three hundred eighty-seven trillion, eight hundred seventy-eight billion, eight hundred twenty-eight million, one hundred twenty-one thousand, two hundred twelve".