394190026812 has 144 divisors (see below), whose sum is σ = 1076721059232. Its totient is φ = 121146347520.

The previous prime is 394190026787. The next prime is 394190026847. The reversal of 394190026812 is 218620091493.

394190026812 is a `hidden beast` number, since 394 + 190 + 0 + 2 + 68 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7395168 + ... + 7448280.

It is an arithmetic number, because the mean of its divisors is an integer number (7477229578).

Almost surely, 2^394190026812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394190026812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538360529616).

394190026812 is an abundant number, since it is smaller than the sum of its proper divisors (682531032420).

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

394190026812 is a wasteful number, since it uses less digits than its factorization.

394190026812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53388 (or 53383 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 394190026812 in words is "three hundred ninety-four billion, one hundred ninety million, twenty-six thousand, eight hundred twelve".