27432381 has 16 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 17918208.

The previous prime is 27432367. The next prime is 27432389. The reversal of 27432381 is 18323472.

It is not a de Polignac number, because 27432381 - 2⁷ = 27432253 is a prime.

It is a super-2 number, since 2×27432381² = 1505071054658322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27432389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33505 + ... + 34313.

It is an arithmetic number, because the mean of its divisors is an integer number (2332800).

Almost surely, 2^27432381 is an apocalyptic number.

It is an amenable number.

27432381 is a deficient number, since it is larger than the sum of its proper divisors (9892419).

27432381 is a wasteful number, since it uses less digits than its factorization.

27432381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 8064, while the sum is 30.

The square root of 27432381 is about 5237.5930540660. The cubic root of 27432381 is about 301.5929379695.

The spelling of 27432381 in words is "twenty-seven million, four hundred thirty-two thousand, three hundred eighty-one".