27720875 has 32 divisors (see below), whose sum is σ = 42596736. Its totient is φ = 17539200.

The previous prime is 27720871. The next prime is 27720877. The reversal of 27720875 is 57802772.

It is not a de Polignac number, because 27720875 - 2² = 27720871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27720871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10157 + ... + 12593.

It is an arithmetic number, because the mean of its divisors is an integer number (1331148).

Almost surely, 2^27720875 is an apocalyptic number.

27720875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27720875 is a deficient number, since it is larger than the sum of its proper divisors (14875861).

27720875 is a wasteful number, since it uses less digits than its factorization.

27720875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2462 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 27720875 is about 5265.0617280332. The cubic root of 27720875 is about 302.6464923503.

The spelling of 27720875 in words is "twenty-seven million, seven hundred twenty thousand, eight hundred seventy-five".