27999999426 has 16 divisors (see below), whose sum is σ = 63999998784. Its totient is φ = 7999999824.

The previous prime is 27999999403. The next prime is 27999999449. The reversal of 27999999426 is 62499999972.

It is an interprime number because it is at equal distance from previous prime (27999999403) and next prime (27999999449).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333333285 + ... + 333333368.

It is an arithmetic number, because the mean of its divisors is an integer number (3999999924).

Almost surely, 2^27999999426 is an apocalyptic number.

27999999426 is an abundant number, since it is smaller than the sum of its proper divisors (35999999358).

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

27999999426 is a wasteful number, since it uses less digits than its factorization.

27999999426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666666665.

The product of its digits is 357128352, while the sum is 75.

The spelling of 27999999426 in words is "twenty-seven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred twenty-six".