27021385 has 8 divisors (see below), whose sum is σ = 32508936. Its totient is φ = 21561600.

The previous prime is 27021383. The next prime is 27021391. The reversal of 27021385 is 58312072.

It can be written as a sum of positive squares in 4 ways, for example, as 12823561 + 14197824 = 3581^2 + 3768^2 .

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

It is not a de Polignac number, because 27021385 - 2¹ = 27021383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27021383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4734 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (4063617).

Almost surely, 2^27021385 is an apocalyptic number.

It is an amenable number.

27021385 is a deficient number, since it is larger than the sum of its proper divisors (5487551).

27021385 is a wasteful number, since it uses less digits than its factorization.

27021385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13883.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 27021385 is about 5198.2097879943. The cubic root of 27021385 is about 300.0791828021.

The spelling of 27021385 in words is "twenty-seven million, twenty-one thousand, three hundred eighty-five".