27840425 has 6 divisors (see below), whose sum is σ = 34522158. Its totient is φ = 22272320.

The previous prime is 27840413. The next prime is 27840433. The reversal of 27840425 is 52404872.

It can be written as a sum of positive squares in 3 ways, for example, as 1297321 + 26543104 = 1139^2 + 5152^2 .

It is not a de Polignac number, because 27840425 - 2⁶ = 27840361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27840391 and 27840400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556784 + ... + 556833.

It is an arithmetic number, because the mean of its divisors is an integer number (5753693).

Almost surely, 2^27840425 is an apocalyptic number.

27840425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27840425 is a deficient number, since it is larger than the sum of its proper divisors (6681733).

27840425 is a wasteful number, since it uses less digits than its factorization.

27840425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113627 (or 1113622 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 27840425 is about 5276.4026571140. The cubic root of 27840425 is about 303.0809363094.

The spelling of 27840425 in words is "twenty-seven million, eight hundred forty thousand, four hundred twenty-five".