3994694578 has 16 divisors (see below), whose sum is σ = 7250874624. Its totient is φ = 1611305280.

The previous prime is 3994694573. The next prime is 3994694593. The reversal of 3994694578 is 8754964993.

It is not an unprimeable number, because it can be changed into a prime (3994694573) 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 in 7 ways as a sum of consecutive naturals, for example, 8391978 + ... + 8392453.

It is an arithmetic number, because the mean of its divisors is an integer number (453179664).

Almost surely, 2^3994694578 is an apocalyptic number.

3994694578 is a deficient number, since it is larger than the sum of its proper divisors (3256180046).

3994694578 is a wasteful number, since it uses less digits than its factorization.

3994694578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16784457.

The product of its digits is 58786560, while the sum is 64.

The square root of 3994694578 is about 63203.5962426190. The cubic root of 3994694578 is about 1586.6989220800.

The spelling of 3994694578 in words is "three billion, nine hundred ninety-four million, six hundred ninety-four thousand, five hundred seventy-eight".