27840825 has 18 divisors (see below), whose sum is σ = 49866414. Its totient is φ = 14848320.

The previous prime is 27840811. The next prime is 27840863. The reversal of 27840825 is 52804872.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6827769 + 21013056 = 2613^2 + 4584^2 .

It is not a de Polignac number, because 27840825 - 2⁵ = 27840793 is a prime.

It is a super-2 number, since 2×27840825² = 1550223073361250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27840825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 61644 + ... + 62093.

Almost surely, 2^27840825 is an apocalyptic number.

27840825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27840825 is a deficient number, since it is larger than the sum of its proper divisors (22025589).

27840825 is a wasteful number, since it uses less digits than its factorization.

27840825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123753 (or 123745 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 27840825 is about 5276.4405615907. The cubic root of 27840825 is about 303.0823878174.

The spelling of 27840825 in words is "twenty-seven million, eight hundred forty thousand, eight hundred twenty-five".