27311980 has 24 divisors (see below), whose sum is σ = 58049712. Its totient is φ = 10792512.

The previous prime is 27311969. The next prime is 27311983. The reversal of 27311980 is 8911372.

It is not an unprimeable number, because it can be changed into a prime (27311983) 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, 6567 + ... + 9886.

It is an arithmetic number, because the mean of its divisors is an integer number (2418738).

Almost surely, 2^27311980 is an apocalyptic number.

27311980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27311980 is an abundant number, since it is smaller than the sum of its proper divisors (30737732).

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

27311980 is a wasteful number, since it uses less digits than its factorization.

27311980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16545 (or 16543 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 27311980 is about 5226.0864899081. The cubic root of 27311980 is about 301.1510593741.

It can be divided in two parts, 27 and 311980, that multiplied together give a triangular number (8423460 = T₄₁₀₄).

The spelling of 27311980 in words is "twenty-seven million, three hundred eleven thousand, nine hundred eighty".