27987201 has 40 divisors (see below), whose sum is σ = 46208448. Its totient is φ = 16740000.

The previous prime is 27987191. The next prime is 27987217. The reversal of 27987201 is 10278972.

It is not a de Polignac number, because 27987201 - 2⁷ = 27987073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27987221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89836 + ... + 90146.

Almost surely, 2^27987201 is an apocalyptic number.

It is an amenable number.

27987201 is a deficient number, since it is larger than the sum of its proper divisors (18221247).

27987201 is a wasteful number, since it uses less digits than its factorization.

27987201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 27987201 is about 5290.2930920697. The cubic root of 27987201 is about 303.6126219190.

It can be divided in two parts, 2798 and 7201, that added together give a palindrome (9999).

The spelling of 27987201 in words is "twenty-seven million, nine hundred eighty-seven thousand, two hundred one".