27621072 has 60 divisors (see below), whose sum is σ = 78265824. Its totient is φ = 9092160.

The previous prime is 27621043. The next prime is 27621089. The reversal of 27621072 is 27012672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10797 + ... + 13107.

Almost surely, 2^27621072 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 27621072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39132912).

27621072 is an abundant number, since it is smaller than the sum of its proper divisors (50644752).

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

27621072 is a wasteful number, since it uses less digits than its factorization.

27621072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 27621072 is about 5255.5753253093. The cubic root of 27621072 is about 302.2828512383.

Subtracting from 27621072 its reverse (27012672), we obtain a square (608400 = 780²).

The spelling of 27621072 in words is "twenty-seven million, six hundred twenty-one thousand, seventy-two".