27920812 has 24 divisors (see below), whose sum is σ = 49896000. Its totient is φ = 13668096.

The previous prime is 27920807. The next prime is 27920819. The reversal of 27920812 is 21802972.

It is not an unprimeable number, because it can be changed into a prime (27920819) 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, 46788 + ... + 47380.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^27920812 is an apocalyptic number.

It is an amenable number.

27920812 is a deficient number, since it is larger than the sum of its proper divisors (21975188).

27920812 is a wasteful number, since it uses less digits than its factorization.

27920812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 27920812 is about 5284.0147615237. The cubic root of 27920812 is about 303.3723633176.

The spelling of 27920812 in words is "twenty-seven million, nine hundred twenty thousand, eight hundred twelve".