394348320 has 288 divisors, whose sum is σ = 1448843760. Its totient is φ = 97320960.

The previous prime is 394348309. The next prime is 394348321. The reversal of 394348320 is 23843493.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 47941776 + 346406544 = 6924^2 + 18612^2 .

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394348321) 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 47 ways as a sum of consecutive naturals, for example, 2178630 + ... + 2178810.

Almost surely, 2^394348320 is an apocalyptic number.

394348320 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 394348320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724421880).

394348320 is an abundant number, since it is smaller than the sum of its proper divisors (1054495440).

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

394348320 is a wasteful number, since it uses less digits than its factorization.

394348320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 394348320 is about 19858.2053569803. The cubic root of 394348320 is about 733.3196654937.

The spelling of 394348320 in words is "three hundred ninety-four million, three hundred forty-eight thousand, three hundred twenty".