394505394 has 64 divisors (see below), whose sum is σ = 828050688. Its totient is φ = 125216000.

The previous prime is 394505389. The next prime is 394505431. The reversal of 394505394 is 493505493.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2280292 + ... + 2280464.

It is an arithmetic number, because the mean of its divisors is an integer number (12938292).

Almost surely, 2^394505394 is an apocalyptic number.

394505394 is an abundant number, since it is smaller than the sum of its proper divisors (433545294).

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

394505394 is a wasteful number, since it uses less digits than its factorization.

394505394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403.

The product of its (nonzero) digits is 291600, while the sum is 42.

The square root of 394505394 is about 19862.1598523423. The cubic root of 394505394 is about 733.4170161161.

Subtracting 394505394 from its reverse (493505493), we obtain a palindrome (99000099).

It can be divided in two parts, 39450 and 5394, that added together give a palindrome (44844).

The spelling of 394505394 in words is "three hundred ninety-four million, five hundred five thousand, three hundred ninety-four".