386978091822 has 144 divisors (see below), whose sum is σ = 1033143873840. Its totient is φ = 104018213376.

The previous prime is 386978091817. The next prime is 386978091833. The reversal of 386978091822 is 228190879683.

386978091822 is a `hidden beast` number, since 386 + 9 + 78 + 0 + 9 + 182 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 386978091822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 55129429 + ... + 55136447.

It is an arithmetic number, because the mean of its divisors is an integer number (7174610235).

Almost surely, 2^386978091822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386978091822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516571936920).

386978091822 is an abundant number, since it is smaller than the sum of its proper divisors (646165782018).

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

386978091822 is a wasteful number, since it uses less digits than its factorization.

386978091822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735 (or 10725 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 386978091822 in words is "three hundred eighty-six billion, nine hundred seventy-eight million, ninety-one thousand, eight hundred twenty-two".