394493670 has 144 divisors (see below), whose sum is σ = 1129293360. Its totient is φ = 95413248.

The previous prime is 394493669. The next prime is 394493707. The reversal of 394493670 is 76394493.

394493670 is a `hidden beast` number, since 3 + 94 + 493 + 6 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 754029 + ... + 754551.

It is an arithmetic number, because the mean of its divisors is an integer number (7842315).

Almost surely, 2^394493670 is an apocalyptic number.

394493670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 394493670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564646680).

394493670 is an abundant number, since it is smaller than the sum of its proper divisors (734799690).

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

394493670 is a wasteful number, since it uses less digits than its factorization.

394493670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 394493670 is about 19861.8647160834. The cubic root of 394493670 is about 733.4097507602.

The spelling of 394493670 in words is "three hundred ninety-four million, four hundred ninety-three thousand, six hundred seventy".