27720064 has 32 divisors (see below), whose sum is σ = 58476600. Its totient is φ = 13043712.

The previous prime is 27720053. The next prime is 27720089. The reversal of 27720064 is 46002772.

It is a tau number, because it is divible by the number of its divisors (32).

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, 4194 + ... + 8545.

Almost surely, 2^27720064 is an apocalyptic number.

It is an amenable number.

27720064 is an abundant number, since it is smaller than the sum of its proper divisors (30756536).

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

27720064 is a wasteful number, since it uses less digits than its factorization.

27720064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12770 (or 12758 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 27720064 is about 5264.9847103292. The cubic root of 27720064 is about 302.6435409199.

The spelling of 27720064 in words is "twenty-seven million, seven hundred twenty thousand, sixty-four".