27661372 has 12 divisors (see below), whose sum is σ = 48532120. Its totient is φ = 13795056.

The previous prime is 27661369. The next prime is 27661373. The reversal of 27661372 is 27316672.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27661373) 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 3 ways as a sum of consecutive naturals, for example, 7122 + ... + 10297.

Almost surely, 2^27661372 is an apocalyptic number.

It is an amenable number.

27661372 is a deficient number, since it is larger than the sum of its proper divisors (20870748).

27661372 is a wasteful number, since it uses less digits than its factorization.

27661372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17820 (or 17818 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 27661372 is about 5259.4079514713. The cubic root of 27661372 is about 302.4297931463.

The spelling of 27661372 in words is "twenty-seven million, six hundred sixty-one thousand, three hundred seventy-two".