27428247 has 64 divisors (see below), whose sum is σ = 51609600. Its totient is φ = 13983840.

The previous prime is 27428243. The next prime is 27428249. The reversal of 27428247 is 74282472.

It is not a de Polignac number, because 27428247 - 2² = 27428243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27428243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164158 + ... + 164324.

It is an arithmetic number, because the mean of its divisors is an integer number (806400).

Almost surely, 2^27428247 is an apocalyptic number.

27428247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

27428247 is a deficient number, since it is larger than the sum of its proper divisors (24181353).

27428247 is a wasteful number, since it uses less digits than its factorization.

27428247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 27428247 is about 5237.1983922704. The cubic root of 27428247 is about 301.5777874090.

The spelling of 27428247 in words is "twenty-seven million, four hundred twenty-eight thousand, two hundred forty-seven".