8000399994 has 32 divisors (see below), whose sum is σ = 16907857920. Its totient is φ = 2518559472.

The previous prime is 8000399993. The next prime is 8000400007. The reversal of 8000399994 is 4999930008.

It is not an unprimeable number, because it can be changed into a prime (8000399993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356022 + ... + 377825.

It is an arithmetic number, because the mean of its divisors is an integer number (528370560).

Almost surely, 2^8000399994 is an apocalyptic number.

8000399994 is an abundant number, since it is smaller than the sum of its proper divisors (8907457926).

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

8000399994 is a wasteful number, since it uses less digits than its factorization.

8000399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733954.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 8000399994 is about 89444.9551064788. The cubic root of 8000399994 is about 2000.0333322778.

The spelling of 8000399994 in words is "eight billion, three hundred ninety-nine thousand, nine hundred ninety-four".