27280725 has 48 divisors (see below), whose sum is σ = 47050560. Its totient is φ = 13939200.

The previous prime is 27280723. The next prime is 27280741. The reversal of 27280725 is 52708272.

It is not a de Polignac number, because 27280725 - 2¹ = 27280723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27280723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 306481 + ... + 306569.

It is an arithmetic number, because the mean of its divisors is an integer number (980220).

Almost surely, 2^27280725 is an apocalyptic number.

27280725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27280725 is a deficient number, since it is larger than the sum of its proper divisors (19769835).

27280725 is a wasteful number, since it uses less digits than its factorization.

27280725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 27280725 is about 5223.0953466312. The cubic root of 27280725 is about 301.0361394855.

Adding to 27280725 its reverse (52708272), we get a palindrome (79988997).

The spelling of 27280725 in words is "twenty-seven million, two hundred eighty thousand, seven hundred twenty-five".