27640472 has 8 divisors (see below), whose sum is σ = 51825900. Its totient is φ = 13820232.

The previous prime is 27640471. The next prime is 27640493. The reversal of 27640472 is 27404672.

It is a tau number, because it is divible by the number of its divisors (8).

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727522 + ... + 1727537.

Almost surely, 2^27640472 is an apocalyptic number.

It is an amenable number.

27640472 is a deficient number, since it is larger than the sum of its proper divisors (24185428).

27640472 is a wasteful number, since it uses less digits than its factorization.

27640472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455065 (or 3455061 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 27640472 is about 5257.4206603619. The cubic root of 27640472 is about 302.3536053700.

The spelling of 27640472 in words is "twenty-seven million, six hundred forty thousand, four hundred seventy-two".