27990329994 has 48 divisors (see below), whose sum is σ = 67065283584. Its totient is φ = 8365723200.

The previous prime is 27990329993. The next prime is 27990330013. The reversal of 27990329994 is 49992309972.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27990329993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 953802 + ... + 982709.

It is an arithmetic number, because the mean of its divisors is an integer number (1397193408).

Almost surely, 2^27990329994 is an apocalyptic number.

27990329994 is an abundant number, since it is smaller than the sum of its proper divisors (39074953590).

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

27990329994 is a wasteful number, since it uses less digits than its factorization.

27990329994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936603 (or 1936600 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 63.

The spelling of 27990329994 in words is "twenty-seven billion, nine hundred ninety million, three hundred twenty-nine thousand, nine hundred ninety-four".