394530408 has 192 divisors, whose sum is σ = 1178012160. Its totient is φ = 118914048.

The previous prime is 394530403. The next prime is 394530419. The reversal of 394530408 is 804035493.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (394530403) 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, 2879716 + ... + 2879852.

It is an arithmetic number, because the mean of its divisors is an integer number (6135480).

Almost surely, 2^394530408 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 394530408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589006080).

394530408 is an abundant number, since it is smaller than the sum of its proper divisors (783481752).

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

394530408 is a wasteful number, since it uses less digits than its factorization.

394530408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 394530408 is about 19862.7895321881. The cubic root of 394530408 is about 733.4325167960.

The spelling of 394530408 in words is "three hundred ninety-four million, five hundred thirty thousand, four hundred eight".