394784536 has 8 divisors (see below), whose sum is σ = 740221020. Its totient is φ = 197392264.

The previous prime is 394784503. The next prime is 394784539. The reversal of 394784536 is 635487493.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 394784536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394784539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24674026 + ... + 24674041.

Almost surely, 2^394784536 is an apocalyptic number.

It is an amenable number.

394784536 is a deficient number, since it is larger than the sum of its proper divisors (345436484).

394784536 is a wasteful number, since it uses less digits than its factorization.

394784536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49348073 (or 49348069 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The square root of 394784536 is about 19869.1855897518. The cubic root of 394784536 is about 733.5899577523.

The spelling of 394784536 in words is "three hundred ninety-four million, seven hundred eighty-four thousand, five hundred thirty-six".