27420557 has 8 divisors (see below), whose sum is σ = 28214784. Its totient is φ = 26636688.

The previous prime is 27420551. The next prime is 27420571. The reversal of 27420557 is 75502472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27420557 - 2⁶ = 27420493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27420551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (3526848).

Almost surely, 2^27420557 is an apocalyptic number.

It is an amenable number.

27420557 is a deficient number, since it is larger than the sum of its proper divisors (794227).

27420557 is a wasteful number, since it uses less digits than its factorization.

27420557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 27420557 is about 5236.4641696473. The cubic root of 27420557 is about 301.5496005310.

The spelling of 27420557 in words is "twenty-seven million, four hundred twenty thousand, five hundred fifty-seven".