394054784 has 64 divisors (see below), whose sum is σ = 822528000. Its totient is φ = 187794432.

The previous prime is 394054783. The next prime is 394054789. The reversal of 394054784 is 487450493.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (394054783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307457 + ... + 308735.

It is an arithmetic number, because the mean of its divisors is an integer number (12852000).

Almost surely, 2^394054784 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 394054784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411264000).

394054784 is an abundant number, since it is smaller than the sum of its proper divisors (428473216).

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

394054784 is a wasteful number, since it uses less digits than its factorization.

394054784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 394054784 is about 19850.8131823359. The cubic root of 394054784 is about 733.1376697456.

The spelling of 394054784 in words is "three hundred ninety-four million, fifty-four thousand, seven hundred eighty-four".