27720704 has 88 divisors (see below), whose sum is σ = 63669888. Its totient is φ = 11939840.

The previous prime is 27720703. The next prime is 27720739. The reversal of 27720704 is 40702772.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720701) 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 in 7 ways as a sum of consecutive naturals, for example, 259019 + ... + 259125.

Almost surely, 2^27720704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27720704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31834944).

27720704 is an abundant number, since it is smaller than the sum of its proper divisors (35949184).

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

27720704 is a wasteful number, since it uses less digits than its factorization.

27720704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 27720704 is about 5265.0454888823. The cubic root of 27720704 is about 302.6458700437.

The spelling of 27720704 in words is "twenty-seven million, seven hundred twenty thousand, seven hundred four".