27420657 has 12 divisors (see below), whose sum is σ = 40187280. Its totient is φ = 16618360.

The previous prime is 27420641. The next prime is 27420661. The reversal of 27420657 is 75602472.

It is not a de Polignac number, because 27420657 - 2⁴ = 27420641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (27420157) 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, 37407 + ... + 38132.

It is an arithmetic number, because the mean of its divisors is an integer number (3348940).

Almost surely, 2^27420657 is an apocalyptic number.

It is an amenable number.

27420657 is a deficient number, since it is larger than the sum of its proper divisors (12766623).

27420657 is a wasteful number, since it uses less digits than its factorization.

27420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75564 (or 75553 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 27420657 is about 5236.4737180664. The cubic root of 27420657 is about 301.5499671042.

The spelling of 27420657 in words is "twenty-seven million, four hundred twenty thousand, six hundred fifty-seven".