394136568 has 192 divisors, whose sum is σ = 1304372160. Its totient is φ = 104951808.

The previous prime is 394136557. The next prime is 394136569. The reversal of 394136568 is 865631493.

Its product of digits (466560) is a multiple of the sum of its prime factors (486).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394136569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1345030 + ... + 1345322.

It is an arithmetic number, because the mean of its divisors is an integer number (6793605).

Almost surely, 2^394136568 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 394136568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652186080).

394136568 is an abundant number, since it is smaller than the sum of its proper divisors (910235592).

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

394136568 is a wasteful number, since it uses less digits than its factorization.

394136568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 479 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 394136568 is about 19852.8730414517. The cubic root of 394136568 is about 733.1883858609.

The spelling of 394136568 in words is "three hundred ninety-four million, one hundred thirty-six thousand, five hundred sixty-eight".