27790955 has 4 divisors (see below), whose sum is σ = 33349152. Its totient is φ = 22232760.

The previous prime is 27790951. The next prime is 27790963. The reversal of 27790955 is 55909772.

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

It is not a de Polignac number, because 27790955 - 2² = 27790951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27790951) 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, 2779091 + ... + 2779100.

It is an arithmetic number, because the mean of its divisors is an integer number (8337288).

Almost surely, 2^27790955 is an apocalyptic number.

27790955 is a deficient number, since it is larger than the sum of its proper divisors (5558197).

27790955 is an equidigital number, since it uses as much as digits as its factorization.

27790955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558196.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 27790955 is about 5271.7127197904. The cubic root of 27790955 is about 302.9013137718.

The spelling of 27790955 in words is "twenty-seven million, seven hundred ninety thousand, nine hundred fifty-five".