394343809024 has 153 divisors (see below), whose sum is σ = 870802825179. Its totient is φ = 178443386880.

The previous prime is 394343808967. The next prime is 394343809103. The reversal of 394343809024 is 420908343493.

The square root of 394343809024 is 627968.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1768357777 + ... + 1768357999.

Almost surely, 2^394343809024 is an apocalyptic number.

394343809024 is the 627968-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394343809024

394343809024 is an abundant number, since it is smaller than the sum of its proper divisors (476459016155).

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

394343809024 is an frugal number, since it uses more digits than its factorization.

394343809024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 49.

Multiplying 394343809024 by its sum of digits (49), we get a square (19322846642176 = 4395776²).

The spelling of 394343809024 in words is "three hundred ninety-four billion, three hundred forty-three million, eight hundred nine thousand, twenty-four".