27980651 has 4 divisors (see below), whose sum is σ = 28576032. Its totient is φ = 27385272.

The previous prime is 27980647. The next prime is 27980653. The reversal of 27980651 is 15608972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27980651 - 2² = 27980647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27980653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297620 + ... + 297713.

It is an arithmetic number, because the mean of its divisors is an integer number (7144008).

Almost surely, 2^27980651 is an apocalyptic number.

27980651 is a deficient number, since it is larger than the sum of its proper divisors (595381).

27980651 is an equidigital number, since it uses as much as digits as its factorization.

27980651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595380.

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

The square root of 27980651 is about 5289.6739975163. The cubic root of 27980651 is about 303.5889346886.

The spelling of 27980651 in words is "twenty-seven million, nine hundred eighty thousand, six hundred fifty-one".