27420520 has 16 divisors (see below), whose sum is σ = 61696260. Its totient is φ = 10968192.

The previous prime is 27420509. The next prime is 27420529. The reversal of 27420520 is 2502472.

It can be written as a sum of positive squares in 2 ways, for example, as 25341156 + 2079364 = 5034^2 + 1442^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27420491 and 27420500.

It is not an unprimeable number, because it can be changed into a prime (27420529) 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, 342717 + ... + 342796.

Almost surely, 2^27420520 is an apocalyptic number.

27420520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27420520 is an abundant number, since it is smaller than the sum of its proper divisors (34275740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27420520 is a wasteful number, since it uses less digits than its factorization.

27420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685524 (or 685520 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 27420520 is about 5236.4606367278. The cubic root of 27420520 is about 301.5494648987.

Adding to 27420520 its reverse (2502472), we get a palindrome (29922992).

The spelling of 27420520 in words is "twenty-seven million, four hundred twenty thousand, five hundred twenty".