4002945994 has 4 divisors (see below), whose sum is σ = 6004418994. Its totient is φ = 2001472996.

The previous prime is 4002945983. The next prime is 4002946019. The reversal of 4002945994 is 4995492004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2958816025 + 1044129969 = 54395^2 + 32313^2 .

It is an unprimeable number.

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, 1000736497 + ... + 1000736500.

Almost surely, 2^4002945994 is an apocalyptic number.

4002945994 is a deficient number, since it is larger than the sum of its proper divisors (2001473000).

4002945994 is a wasteful number, since it uses less digits than its factorization.

4002945994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001472999.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 4002945994 is about 63268.8390441930. The cubic root of 4002945994 is about 1587.7906624992.

The spelling of 4002945994 in words is "four billion, two million, nine hundred forty-five thousand, nine hundred ninety-four".