394364838 has 48 divisors (see below), whose sum is σ = 934850160. Its totient is φ = 110545344.

The previous prime is 394364837. The next prime is 394364851. The reversal of 394364838 is 838463493.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394364837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2928 + ... + 28236.

It is an arithmetic number, because the mean of its divisors is an integer number (19476045).

Almost surely, 2^394364838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394364838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467425080).

394364838 is an abundant number, since it is smaller than the sum of its proper divisors (540485322).

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

394364838 is a wasteful number, since it uses less digits than its factorization.

394364838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25381 (or 25374 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 394364838 is about 19858.6212512349. The cubic root of 394364838 is about 733.3299041621.

The spelling of 394364838 in words is "three hundred ninety-four million, three hundred sixty-four thousand, eight hundred thirty-eight".