27156980 has 24 divisors (see below), whose sum is σ = 57587712. Its totient is φ = 10756512.

The previous prime is 27156977. The next prime is 27156989. The reversal of 27156980 is 8965172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27156989) 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, 4532 + ... + 8651.

It is an arithmetic number, because the mean of its divisors is an integer number (2399488).

Almost surely, 2^27156980 is an apocalyptic number.

27156980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27156980 is an abundant number, since it is smaller than the sum of its proper divisors (30430732).

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

27156980 is a wasteful number, since it uses less digits than its factorization.

27156980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13295 (or 13293 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 27156980 is about 5211.2359378558. The cubic root of 27156980 is about 300.5802842510.

The spelling of 27156980 in words is "twenty-seven million, one hundred fifty-six thousand, nine hundred eighty".