394530400 has 144 divisors (see below), whose sum is σ = 1063056960. Its totient is φ = 141785600.

The previous prime is 394530391. The next prime is 394530403. The reversal of 394530400 is 4035493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394530403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 941391 + ... + 941809.

It is an arithmetic number, because the mean of its divisors is an integer number (7382340).

Almost surely, 2^394530400 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 394530400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531528480).

394530400 is an abundant number, since it is smaller than the sum of its proper divisors (668526560).

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

394530400 is a wasteful number, since it uses less digits than its factorization.

394530400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 394530400 is about 19862.7893308065. The cubic root of 394530400 is about 733.4325118387.

Adding to 394530400 its reverse (4035493), we get a palindrome (398565893).

The spelling of 394530400 in words is "three hundred ninety-four million, five hundred thirty thousand, four hundred".