394660500 has 192 divisors, whose sum is σ = 1273429248. Its totient is φ = 94348800.

The previous prime is 394660481. The next prime is 394660531. The reversal of 394660500 is 5066493.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 721227 + ... + 721773.

It is an arithmetic number, because the mean of its divisors is an integer number (6632444).

Almost surely, 2^394660500 is an apocalyptic number.

394660500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394660500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636714624).

394660500 is an abundant number, since it is smaller than the sum of its proper divisors (878768748).

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

394660500 is a wasteful number, since it uses less digits than its factorization.

394660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 394660500 is about 19866.0640288911. The cubic root of 394660500 is about 733.5131216668.

It can be divided in two parts, 3946 and 60500, that added together give a palindrome (64446).

The spelling of 394660500 in words is "three hundred ninety-four million, six hundred sixty thousand, five hundred".