27998001423 has 24 divisors (see below), whose sum is σ = 47002300800. Its totient is φ = 15727688784.

The previous prime is 27998001419. The next prime is 27998001443. The reversal of 27998001423 is 32410089972.

It is not a de Polignac number, because 27998001423 - 2² = 27998001419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27998001443) 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, 3762493 + ... + 3769926.

It is an arithmetic number, because the mean of its divisors is an integer number (1958429200).

Almost surely, 2^27998001423 is an apocalyptic number.

27998001423 is a deficient number, since it is larger than the sum of its proper divisors (19004299377).

27998001423 is a wasteful number, since it uses less digits than its factorization.

27998001423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532491 (or 7532488 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 27998001423 in words is "twenty-seven billion, nine hundred ninety-eight million, one thousand, four hundred twenty-three".