27997005380 has 24 divisors (see below), whose sum is σ = 59101539840. Its totient is φ = 11140168160.

The previous prime is 27997005371. The next prime is 27997005389. The reversal of 27997005380 is 8350079972.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27997005371) and next prime (27997005389).

It is not an unprimeable number, because it can be changed into a prime (27997005389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3660710 + ... + 3668349.

It is an arithmetic number, because the mean of its divisors is an integer number (2462564160).

Almost surely, 2^27997005380 is an apocalyptic number.

27997005380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27997005380 is an abundant number, since it is smaller than the sum of its proper divisors (31104534460).

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

27997005380 is a wasteful number, since it uses less digits than its factorization.

27997005380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329259 (or 7329257 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 27997005380 in words is "twenty-seven billion, nine hundred ninety-seven million, five thousand, three hundred eighty".