27471945 has 16 divisors (see below), whose sum is σ = 45144000. Its totient is φ = 14255424.

The previous prime is 27471919. The next prime is 27471947. The reversal of 27471945 is 54917472.

It is not a de Polignac number, because 27471945 - 2¹² = 27467849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27471947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24195 + ... + 25304.

It is an arithmetic number, because the mean of its divisors is an integer number (2821500).

Almost surely, 2^27471945 is an apocalyptic number.

It is an amenable number.

27471945 is a deficient number, since it is larger than the sum of its proper divisors (17672055).

27471945 is a wasteful number, since it uses less digits than its factorization.

27471945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49544.

The product of its digits is 70560, while the sum is 39.

The square root of 27471945 is about 5241.3686189773. The cubic root of 27471945 is about 301.7378578390.

The spelling of 27471945 in words is "twenty-seven million, four hundred seventy-one thousand, nine hundred forty-five".