27820801 has 4 divisors (see below), whose sum is σ = 28292400. Its totient is φ = 27349204.

The previous prime is 27820783. The next prime is 27820841. The reversal of 27820801 is 10802872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27820801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27820801.

It is not an unprimeable number, because it can be changed into a prime (27820841) 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, 235711 + ... + 235828.

It is an arithmetic number, because the mean of its divisors is an integer number (7073100).

Almost surely, 2^27820801 is an apocalyptic number.

It is an amenable number.

27820801 is a deficient number, since it is larger than the sum of its proper divisors (471599).

27820801 is an equidigital number, since it uses as much as digits as its factorization.

27820801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471598.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 27820801 is about 5274.5427289956. The cubic root of 27820801 is about 303.0097082506.

The spelling of 27820801 in words is "twenty-seven million, eight hundred twenty thousand, eight hundred one".