4000389994 has 8 divisors (see below), whose sum is σ = 6014839428. Its totient is φ = 1995443520.

The previous prime is 4000389983. The next prime is 4000390033. The reversal of 4000389994 is 4999830004.

It can be written as a sum of positive squares in 2 ways, for example, as 3540845025 + 459544969 = 59505^2 + 21437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374687 + ... + 2376370.

Almost surely, 2^4000389994 is an apocalyptic number.

4000389994 is a deficient number, since it is larger than the sum of its proper divisors (2014449434).

4000389994 is a wasteful number, since it uses less digits than its factorization.

4000389994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751480.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 4000389994 is about 63248.6363015046. The cubic root of 4000389994 is about 1587.4526400321.

The spelling of 4000389994 in words is "four billion, three hundred eighty-nine thousand, nine hundred ninety-four".