27720641 has 8 divisors (see below), whose sum is σ = 29898624. Its totient is φ = 25549200.

The previous prime is 27720617. The next prime is 27720661. The reversal of 27720641 is 14602772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27720641 - 2⁶ = 27720577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27720661) 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, 10616 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (3737328).

Almost surely, 2^27720641 is an apocalyptic number.

It is an amenable number.

27720641 is a deficient number, since it is larger than the sum of its proper divisors (2177983).

27720641 is a wasteful number, since it uses less digits than its factorization.

27720641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 27720641 is about 5265.0395060246. The cubic root of 27720641 is about 302.6456407721.

The spelling of 27720641 in words is "twenty-seven million, seven hundred twenty thousand, six hundred forty-one".