27640461 has 8 divisors (see below), whose sum is σ = 36941184. Its totient is φ = 18383360.

The previous prime is 27640447. The next prime is 27640471. The reversal of 27640461 is 16404672.

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 27640461 - 2⁵ = 27640429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27640471) 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, 9396 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (4617648).

Almost surely, 2^27640461 is an apocalyptic number.

It is an amenable number.

27640461 is a deficient number, since it is larger than the sum of its proper divisors (9300723).

27640461 is a wasteful number, since it uses less digits than its factorization.

27640461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21811.

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

The square root of 27640461 is about 5257.4196142214. The cubic root of 27640461 is about 302.3535652610.

The spelling of 27640461 in words is "twenty-seven million, six hundred forty thousand, four hundred sixty-one".