27490257 has 12 divisors (see below), whose sum is σ = 39771264. Its totient is φ = 18297720.

The previous prime is 27490249. The next prime is 27490259. The reversal of 27490257 is 75209472.

It is not a de Polignac number, because 27490257 - 2³ = 27490249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27490259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4632 + ... + 8742.

It is an arithmetic number, because the mean of its divisors is an integer number (3314272).

Almost surely, 2^27490257 is an apocalyptic number.

It is an amenable number.

27490257 is a deficient number, since it is larger than the sum of its proper divisors (12281007).

27490257 is a wasteful number, since it uses less digits than its factorization.

27490257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860 (or 4857 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 27490257 is about 5243.1151999551. The cubic root of 27490257 is about 301.8048861766.

The spelling of 27490257 in words is "twenty-seven million, four hundred ninety thousand, two hundred fifty-seven".