27789920 has 24 divisors (see below), whose sum is σ = 65654064. Its totient is φ = 11115904.

The previous prime is 27789901. The next prime is 27789941. The reversal of 27789920 is 2998772.

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, 86684 + ... + 87003.

It is an arithmetic number, because the mean of its divisors is an integer number (2735586).

Almost surely, 2^27789920 is an apocalyptic number.

27789920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27789920 is an abundant number, since it is smaller than the sum of its proper divisors (37864144).

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

27789920 is a wasteful number, since it uses less digits than its factorization.

27789920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173702 (or 173694 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 27789920 is about 5271.6145534362. The cubic root of 27789920 is about 302.8975534746.

The spelling of 27789920 in words is "twenty-seven million, seven hundred eighty-nine thousand, nine hundred twenty".