27530945 has 24 divisors (see below), whose sum is σ = 36963072. Its totient is φ = 19656000.

The previous prime is 27530941. The next prime is 27530959. The reversal of 27530945 is 54903572.

It is not a de Polignac number, because 27530945 - 2² = 27530941 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27530941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25670 + ... + 26720.

It is an arithmetic number, because the mean of its divisors is an integer number (1540128).

Almost surely, 2^27530945 is an apocalyptic number.

It is an amenable number.

27530945 is a deficient number, since it is larger than the sum of its proper divisors (9432127).

27530945 is a wasteful number, since it uses less digits than its factorization.

27530945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 27530945 is about 5246.9939012734. The cubic root of 27530945 is about 301.9537120409.

It can be divided in two parts, 275 and 30945, that multiplied together give a triangular number (8509875 = T₄₁₂₅).

The spelling of 27530945 in words is "twenty-seven million, five hundred thirty thousand, nine hundred forty-five".