27640456 has 8 divisors (see below), whose sum is σ = 51825870. Its totient is φ = 13820224.

The previous prime is 27640447. The next prime is 27640471. The reversal of 27640456 is 65404672.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 6937956 = 4550^2 + 2634^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727521 + ... + 1727536.

Almost surely, 2^27640456 is an apocalyptic number.

It is an amenable number.

27640456 is a deficient number, since it is larger than the sum of its proper divisors (24185414).

27640456 is a wasteful number, since it uses less digits than its factorization.

27640456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455063 (or 3455059 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 27640456 is about 5257.4191387029. The cubic root of 27640456 is about 302.3535470297.

The spelling of 27640456 in words is "twenty-seven million, six hundred forty thousand, four hundred fifty-six".