27291980 has 24 divisors (see below), whose sum is σ = 60330480. Its totient is φ = 10342080.

The previous prime is 27291973. The next prime is 27292003. The reversal of 27291980 is 8919272.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 35531 + ... + 36290.

It is an arithmetic number, because the mean of its divisors is an integer number (2513770).

Almost surely, 2^27291980 is an apocalyptic number.

27291980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27291980 is an abundant number, since it is smaller than the sum of its proper divisors (33038500).

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

27291980 is a wasteful number, since it uses less digits than its factorization.

27291980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71849 (or 71847 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 27291980 is about 5224.1726617714. The cubic root of 27291980 is about 301.0775325193.

The spelling of 27291980 in words is "twenty-seven million, two hundred ninety-one thousand, nine hundred eighty".