27640416 has 24 divisors (see below), whose sum is σ = 72556344. Its totient is φ = 9213440.

The previous prime is 27640391. The next prime is 27640423. The reversal of 27640416 is 61404672.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143865 + ... + 144056.

It is an arithmetic number, because the mean of its divisors is an integer number (3023181).

Almost surely, 2^27640416 is an apocalyptic number.

It is an amenable number.

27640416 is an abundant number, since it is smaller than the sum of its proper divisors (44915928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27640416 is a wasteful number, since it uses less digits than its factorization.

27640416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287934 (or 287926 counting only the distinct ones).

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

The square root of 27640416 is about 5257.4153345537. The cubic root of 27640416 is about 302.3534011789.

The spelling of 27640416 in words is "twenty-seven million, six hundred forty thousand, four hundred sixteen".