27428245 has 8 divisors (see below), whose sum is σ = 35445816. Its totient is φ = 20254656.

The previous prime is 27428243. The next prime is 27428249. The reversal of 27428245 is 54282472.

It can be written as a sum of positive squares in 4 ways, for example, as 4761124 + 22667121 = 2182^2 + 4761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27428245 - 2¹ = 27428243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27428245.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210922 + ... + 211051.

It is an arithmetic number, because the mean of its divisors is an integer number (4430727).

Almost surely, 2^27428245 is an apocalyptic number.

It is an amenable number.

27428245 is a deficient number, since it is larger than the sum of its proper divisors (8017571).

27428245 is a wasteful number, since it uses less digits than its factorization.

27428245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421991.

The product of its digits is 35840, while the sum is 34.

The square root of 27428245 is about 5237.1982013286. The cubic root of 27428245 is about 301.5777800789.

It can be divided in two parts, 2 and 7428245, that added together give a palindrome (7428247).

The spelling of 27428245 in words is "twenty-seven million, four hundred twenty-eight thousand, two hundred forty-five".