394231032426 has 144 divisors (see below), whose sum is σ = 1009867799808. Its totient is φ = 102223376640.

The previous prime is 394231032401. The next prime is 394231032431. The reversal of 394231032426 is 624230132493.

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, 21584290 + ... + 21602546.

It is an arithmetic number, because the mean of its divisors is an integer number (7012970832).

Almost surely, 2^394231032426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394231032426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504933899904).

394231032426 is an abundant number, since it is smaller than the sum of its proper divisors (615636767382).

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

394231032426 is a wasteful number, since it uses less digits than its factorization.

394231032426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18905 (or 18887 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 39.

The spelling of 394231032426 in words is "three hundred ninety-four billion, two hundred thirty-one million, thirty-two thousand, four hundred twenty-six".