27438607998 has 24 divisors (see below), whose sum is σ = 59465594136. Its totient is φ = 9143852400.

The previous prime is 27438607979. The next prime is 27438608053. The reversal of 27438607998 is 89970683472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123133 + ... + 264648.

It is an arithmetic number, because the mean of its divisors is an integer number (2477733089).

Almost surely, 2^27438607998 is an apocalyptic number.

27438607998 is an abundant number, since it is smaller than the sum of its proper divisors (32026986138).

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

27438607998 is a wasteful number, since it uses less digits than its factorization.

27438607998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391720 (or 391717 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 27438607998 in words is "twenty-seven billion, four hundred thirty-eight million, six hundred seven thousand, nine hundred ninety-eight".